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Learner Centered Astronomy A Teaching Excellence Workshop
Ed Prather and Gina Brissenden
University of ArizonaCenter for Astronomy Education
Sponsored by the NASA Navigator Public Engagement Programs
http://astronomy101.jpl.nasa.gov
What Can I do Besides Lecture to Engage Students in their Learning?
• Ask students questions (not all questions are equal). Use demonstrations (interactive lecture demos)
• Surprise quizzes (graded/ungraded)
• In-class writing (with/without discussion)- muddiest point- summary of today's main points- 5-minute free writing
• Think-Pair-Share (Peer Instruction-ConcepTests)
• Small Group Interactions
• Student Debates (individual/group)
• Whole Class Discussions
• Jigsawing
Let's Try an In-Class Small Group Activity
From:
Lecture-Tutorials for Introductory AstronomyPrather, Slater, Adams and Brissenden
(2nd edition 2007)
How Research on Student Beliefs and Reasoning Difficulties are used to
Promote a Learner-Centered Introductory Astronomy
Classroom
OR
Are you really teaching if your students are not
learning?
Another talk about the teaching and learning…..
“I’ve seen it performed many times, but I can’t remember ever sleeping through it so peacefully.”
“I’ve seen it performed many times, but I can’t remember ever sleeping through it so peacefully.”
How often do you hear the following from your students?
• I just can’t do science!• I just can’t do math!• I understand your lectures and the readings, but I
can’t do the homework.• I did all of the homework three times, but I can’t do
well on your tests.• I just can’t do history!
From a teaching and learning perspective, just what is it that makes astronomy different?
Astronomy Diagnostics Test (ADT)
If you could see stars during the day, this is what the sky would look like at noon on a given day. The Sun is near the stars of the constellation Gemini. Near which constellation would you expect the Sun to be located at sunset?
A) Leo C) Gemini E) Pisces
B) Cancer D) Taurus
11% 73%
South West East
Leo
Cancer
Gemini
Taurus
Pisces
Sun
OOPS!!
BUT I AM A GREAT TEACHER!!!!
The Real Situation- from How People Learn
“Students enter your lecture hall with preconceptions about how the world works. If their initial understanding is not engaged, they may fail to grasp the new concepts and information that are taught, or they may learn them for the purposes of a test but revert to their preconceptions outside the classroom”
HOW PEOPLE LEARN, National Research Council,
National Academy Press, 2000.
From How People Learn
“Humans are viewed as goal-directed agents who actively seek information. They come to formal education with a range of prior knowledge, skills, beliefs, and concepts that significantly influence what they notice about the environment and how they organize and interpret it. This, in turn, affects their abilities to remember, reason, solve problems, and acquire new knowledge. … If students’ initial ideas and beliefs are ignored, the understandings that they develop can be very different from what the teacher intends.”
HOW PEOPLE LEARN, National Research Council,
National Academy Press, 2000.
• Students enter the classroom with preconceptions about how the world works. If their initial understanding is not fully engaged, they may fail to grasp new concepts in meaningful ways that last beyond the purposes of an exam.
• To fully develop competence, students must: (1) have a deep foundation of factual knowledge, (2) understand interrelationships among facts and concepts and (3) organize knowledge in ways that facilitate retrieval and application
• A “metacognitive” approach to instruction can help students learn to take control of their own learning and monitor progress.
How People Learn: Brain, Mind, Experience, and School (Expanded Edition),National Research Council, National Academy Press, 2000.
How People Learn
Key results from research into education and cognition
1. Learning is productive / constructive - learning requires mental effort
2. Knowledge is associative / linked to prior mental models and cognitive structures
3. The cognitive response is context dependent – what and how you learn depends on the educational setting
4. Most people require some social interactions in order to learn deeply and effectively
• The introductory course for non-science majors could be significantly improved
• Although the lecture approach is largely insufficient, there are instructional strategies available to accompany lecture that intellectually engage students
• Large enrollment courses can use learner-centered instructional strategies
• Awareness of and exposure to active learning techniques will motivate faculty to try them
Our Assumptions
Active Learning
• Active learning is when students take active responsibility for participating in and monitoring of their own learning by engaging in critical reasoning about the ideas presented in the class.
A Commonly Held Inaccurate Model of a Student’s Conceptual Framework
A Commonly Held Inaccurate Model of Teaching and Learning
So What Can You Do About It?
• Lecture more loudly?
Assumption #1 - Lecture is ineffective at promoting deep conceptual change.
• This was NOT a traditional case study that had a control group and used two treatments with a randomized population of participants
• Population – students enrolled in the introductory astronomy course for non-science majors
Assumption #1 - Lecture is ineffective at promoting deep conceptual change.
• Instrument used: A 68 items research based multiple choice questionnaire
• Pre-Course: two forms, A&B, which each contained a subset of questions
• Post-Lecture: questions administered in subsets that directly reflected topic of lecture
Celestial Motion of Objects
You observe a star rising directly to the east. When this star reaches its highest position above the horizon, where will it be?
a) high in the northern sky b) high in the eastern sky c) high in the southern sky d) high in the western sky e) directly overhead
Celestial Motion of Objects
• Before Lecture (N=42): 2% correct
You observe a star rising directly to the east. When this star reaches its highest position above the horizon, where will it be?
a) high in the northern sky b) high in the eastern sky c) high in the southern sky d) high in the western sky e) directly overhead
The diagram below shows Earth and the Sun as well as five different possible positions for the Moon. Which position of the Moon best corresponds with the phase of the Moon shown in the figure at the right?
Sun
NOT TO SCALE
Orbit of the Moon
Earth
A
B
C
D
E
What Causes Moon Phases
The diagram below shows Earth and the Sun as well as five different possible positions for the Moon. Which position of the Moon best corresponds with the phase of the Moon shown in the figure at the right?
Sun
NOT TO SCALE
Orbit of the Moon
Earth
A
B
C
D
E
What Causes Moon Phases
• Before Lecture (N=42): 5% correct
The graph below shows the blackbody spectra for three different stars. Which of the stars is at the highest temperature?
a) Star A
b) Star B
c) Star C Star C
Star B
Star A
Wavelength
Ene
rgy
Out
put p
er s
econ
d
Blackbody Radiation LT
The graph at right shows the blackbody spectra for three different stars. Which of the stars is at the highest temperature?
a) Star A
b) Star B
c) Star CStar C
Star B
Star A
Wavelength
Ene
rgy
Out
put p
er s
econ
d
Blackbody Radiation LT
• Before Lecture (N=42): 12% correct
H-R Diagrams and Spectral Class
A red giant of spectral type K9 and a red main sequence star of the same spectral type have the same
a) luminosity.
b) temperature.
c) absolute magnitude.
H-R Diagrams and Spectral Class
A red giant of spectral type K9 and a red main sequence star of the same spectral type have the same
a) luminosity.
b) temperature.
c) absolute magnitude.
• Before Lecture (N=39): 41% correct
If our universe is expanding, what are the implications for the separation between two stars within our galaxy?
a) The two stars are moving farther apart. b) The two stars are moving closer together. c) The two stars are remaining approximately the
same distance apart.
Expansion of the Universe
If our universe is expanding, what are the implications for the separation between two stars within our galaxy?
a) The two stars are moving farther apart. b) The two stars are moving closer together. c) The two stars are remaining approximately the
same distance apart.
Expansion of the Universe
• Before Lecture (N=39): 19% correct
Looking at Distant ObjectsImagine that you simultaneously receive the satellite transmission of two pictures of two people that live on planets orbiting two different stars. Each image shows the people at their 21st birthday parties. Consider the following possible interpretations that could be made from your observations. Which do you think is the most plausible interpretation?
a) Both people are the same age but at different distances from you.b) The people are actually different ages but at the same distance from you.c) The person that is closer to you is actually the older of the two people.d) The person that is farther from you is actually the older of the two people.
Looking at Distant Objects
Imagine that you simultaneously receive the satellite transmission of two pictures of two people that live on planets orbiting two different stars. Each image shows the people at their 21st birthday parties. Consider the following possible interpretations that could be made from your observations. Which do you think is the most plausible interpretation?
a) Both people are the same age but at different distances from you.b) The people are actually different ages but at the same distance from you.c) The person that is closer to you is actually the older of the two people.d) The person that is farther from you is actually the older of the two people.
• Before Lecture (N=39): 53% correct
Assumption #1 - Lecture is ineffective at promoting deep conceptual change.
• Instrument used: A 68 items research based multiple choice questionnaire
• Pre-Course: two forms, A&B, which each contained a subset of questions
Pre-Course mean: 30% (nA=39,nB=42)
So What Can You Do About It?
• Lecture more loudly?
Funky Winkerbean
BY TOM BATIUK
Celestial Motion of Objects
• Before Lecture (N=42): 2% correct
You observe a star rising directly to the east. When this star reaches its highest position above the horizon, where will it be?
a) high in the northern sky b) high in the eastern sky c) high in the southern sky d) high in the western sky e) directly overhead
Celestial Motion of Objects
• Before Lecture (N=42): 2% correct
• After Lecture (N = 135): 19% correct
You observe a star rising directly to the east. When this star reaches its highest position above the horizon, where will it be?
a) high in the northern sky b) high in the eastern sky c) high in the southern sky d) high in the western sky e) directly overhead
The diagram below shows Earth and the Sun as well as five different possible positions for the Moon. Which position of the Moon best corresponds with the phase of the Moon shown in the figure at the right?
Sun
NOT TO SCALE
Orbit of the Moon
Earth
A
B
C
D
E
What Causes Moon Phases
• Before Lecture (N=42): 5% correct
The diagram below shows Earth and the Sun as well as five different possible positions for the Moon. Which position of the Moon best corresponds with the phase of the Moon shown in the figure at the right?
Sun
NOT TO SCALE
Orbit of the Moon
Earth
A
B
C
D
E
What Causes Moon Phases
• Before Lecture (N=42): 5% correct
• After Lecture (N=127): 53% correct
The graph at right shows the blackbody spectra for three different stars. Which of the stars is at the highest temperature?
a) Star A
b) Star B
c) Star CStar C
Star B
Star A
Wavelength
Ene
rgy
Out
put p
er s
econ
d
Blackbody Radiation LT
• Before Lecture (N=42): 12% correct
The graph at right shows the blackbody spectra for three different stars. Which of the stars is at the highest temperature?
a) Star A
b) Star B
c) Star CStar C
Star B
Star A
Wavelength
Ene
rgy
Out
put p
er s
econ
d
Blackbody Radiation LT
• Before Lecture (N=42): 12% correct
• After Lecture (N=120): 16% correct
H-R Diagrams and Spectral Class
A red giant of spectral type K9 and a red main sequence star of the same spectral type have the same
a) luminosity.
b) temperature.
c) absolute magnitude.
• Before Lecture (N=39): 41% correct
H-R Diagrams and Spectral Class
A red giant of spectral type K9 and a red main sequence star of the same spectral type have the same
a) luminosity.
b) temperature.
c) absolute magnitude.
• Before Lecture (N=39): 41% correct
• After Lecture (N=86): 48% correct
If our universe is expanding, what are the implications for the separation between two stars within our galaxy?
a) The two stars are moving farther apart. b) The two stars are moving closer together. c) The two stars are remaining approximately the
same distance apart.
Expansion of the Universe
• Before Lecture (N=39): 19% correct
If our universe is expanding, what are the implications for the separation between two stars within our galaxy?
a) The two stars are moving farther apart. b) The two stars are moving closer together. c) The two stars are remaining approximately the
same distance apart.
Expansion of the Universe
• Before Lecture (N=39): 19% correct
• After Lecture (N = 85): 27% correct
Looking at Distant Objects
Imagine that you simultaneously receive the satellite transmission of two pictures of two people that live on planets orbiting two different stars. Each image shows the people at their 21st birthday parties. Consider the following possible interpretations that could be made from your observations. Which do you think is the most plausible interpretation?
a) Both people are the same age but at different distances from you.b) The people are actually different ages but at the same distance from you.c) The person that is closer to you is actually the older of the two people.d) The person that is farther from you is actually the older of the two people.
• Before Lecture (N=39): 53% correct
Looking at Distant ObjectsImagine that you simultaneously receive the satellite transmission of two pictures of two people that live on planets orbiting two different stars. Each image shows the people at their 21st birthday parties. Consider the following possible interpretations that could be made from your observations. Which do you think is the most plausible interpretation?
a) Both people are the same age but at different distances from you.b) The people are actually different ages but at the same distance from you.c) The person that is closer to you is actually the older of the two people.d) The person that is farther from you is actually the older of the two people.
• Before Lecture (N=39): 53% correct
• After Lecture (N = 94): 51% correct
Assumption #1: Lecture is ineffective at promoting deep conceptual change.
• Instrument used: A 68 items research based multiple choice questionnaire
• Pre-Course: two forms, A&B, which each contained a subset of questions
• Post-Lecture: questions administered in subsets that directly reflected topic of lecture
Pre-Course mean: 30% (nA=39,nB=42)Post-Lecture mean: 52% (n ~ 100)
So What Can You Do About It?
• Lecture more loudly?• It’s not what the instructor does that matters;
rather, it is what the students do that matters• Create a learner-centered environment that
promotes the intellectual engagement of your students
• For large-enrollment lectures, we created Lecture-Tutorials for Introductory Astronomy
Development of Lecture-Tutorialsfor Introductory Astronomy
• Based on the topics faculty most often cover • Require ~15-minutes and are designed for easy
implementation into existing traditional lecture courses• Socratic-dialogue driven, highly-structured collaborative
learning activities designed to:• elicit misconceptions• confront naïve, incomplete, or inaccurate ideas• resolve contradictions• demonstrate the power of THEIR conceptual models
Idealized Classroom Implementation• Professor lectures for approximately 20 minutes on core
ideas of the topic to prepare students for working on the activity
• Students are posed a conceptually challenging question on the presented lecture material to set the stage for the activity to come
• Class is divided into pairs or small groups and instructed to work collaboratively and reach consensus on the questions presented in the lecture-tutorial activity
• Professor “debriefs” the activity interactively highlighting the difficulties in reasoning and common problems
• Professor returns to lecture mode on next course topic
Drum roll please
Lecture-Tutorial
Motion
North Star
Earth’s Equator
Celestial Sphere Rotation
Celestial Sphere Rotation
Celestial Sphere
Star A
Star B
1
1
3
2
2
4
4
3
Figure 1
Horizon
Idealized Classroom Implementation• Professor lectures for approximately 20 minutes on core
ideas of the topic to prepare students for working on the activity
• Students are posed a conceptually challenging question on the presented lecture material to set the stage for the activity to come
• Class is divided into pairs or small groups and instructed to work collaboratively and reach consensus on the questions presented in the lecture-tutorial activity
• Professor “debriefs” the activity interactively highlighting the difficulties in reasoning and common problems
• Professor returns to lecture mode on next course topic
What Do You Do During a Small Group Activity?
• This is the chance to actually get to talk with your students about their learning of astronomy.
• Nudge groups with helpful question to steer their group discussion in the right direction.
• Ask two nearby groups to check their answer and to account for any differences to facilitate class interactions.
• Pull in non-participants by asking them what and why the other group members answered the way that they did.
• Offer thought provoking questions that help students engage with the concepts.
• Circle the wagons afterward ( i.e., debrief )
Always in pursuit of the TEACHABLE MOMENT
Topics
• Light and EM Spect.• Trig. Parallax• Cosmology and B.B.• Telescopes and Star
Maps• Solar System• Our Sun
• Solar System Motion• Moon Phases• Stellar Evolution• Char. of Milky Way• Celestial Sphere• Stellar Magnitudes• Stellar Spectra
Topics
• Light and EM Spect.• Trig. Parallax• Cosmology and B.B.• Telescopes and Star
Maps• Solar System• Our Sun
• Solar System Motion• Moon Phases• Stellar Evolution• Char. of Milky Way• Celestial Sphere• Stellar Magnitudes• Stellar Spectra
Topics
• Cause of Moon Phases
• Predicting Moon Phases
Predicting Moon PhasesWhich of the following is possible?
a) a waxing crescent Moon on the eastern horizon just after sunset.
b) a waning gibbous on the western horizon just after sunset.
c) a waning crescent Moon on the eastern horizon just before sunrise.
d) a full Moon on the western horizon at sunsete) a first quarter moon rising at dawn.
Predicting Moon PhasesWhich of the following is possible?
a) a waxing crescent Moon on the eastern horizon just after sunset.
b) a waning gibbous on the western horizon just after sunset.
c) a waning crescent Moon on the eastern horizon just before sunrise.
d) a full Moon on the western horizon at sunsete) a first quarter moon rising at dawn.
Consider the following debate between two students about the cause of the phases of the Moon.
Which, if either, do you agree with and why?
Student 1: The phase of the Moon depends on how the Moon, Sun and Earth are aligned with one another. During some alignments only a small portion of the Moon’s surface will receive light from the Sun, in which case we would see a crescent moon.
Consider the following debate between two students about the cause of the phases of the Moon. Which,
if either, do you agree with? Why?Student 1: The phase of the Moon depends on how the
Moon, Sun and Earth are aligned with one another. During some alignments only a small portion of the Moon’s surface will receive light from the Sun, in which case we would see a crescent moon.
Student 2: I disagree. The moon would always get the same amount of sunlight it’s just that in some alignments Earth casts a larger shadow on the Moon. That’s why the Moon isn’t always a full moon.
Modern Topics too!!
• Milky Way Scales• Expansion of the Universe• Looking at Distant Objects
Assumption #2: Lecture-Tutorials can intellectually engage students at a
level that is more effective than traditional lecture at promoting deep
conceptual change.
• Post Lecture-Tutorial: questions administered in subsets
Pre-Course mean: 30% (nA=39,nB=42)Post-Lecture mean: 52% (n ~ 100)
Celestial Motion of Objects
• Before Lecture (N=42): 2% correct
• After Lecture (N = 135): 19% correct
You observe a star rising directly to the east. When this star reaches its highest position above the horizon, where will it be?
a) high in the northern sky b) high in the eastern sky c) high in the southern sky d) high in the western sky e) directly overhead
Celestial Motion of Objects
• Before Lecture (N=42): 2% correct• After Lecture (N = 135): 19% correct• After Lecture Tutorial (N=134): 66%
correct
You observe a star rising directly to the east. When this star reaches its highest position above the horizon, where will it be?
a) high in the northern sky b) high in the eastern sky c) high in the southern sky d) high in the western sky e) directly overhead
The graph at right shows the blackbody spectra for three different stars. Which of the stars is at the highest temperature?
a) Star A
b) Star B
c) Star CStar C
Star B
Star A
Wavelength
Ene
rgy
Out
put p
er s
econ
d
Blackbody Radiation LT
• Before Lecture (N=42): 12% correct
• After Lecture (N=120): 16% correct
The graph at right shows the blackbody spectra for three different stars. Which of the stars is at the highest temperature?
a) Star A
b) Star B
c) Star CStar C
Star B
Star A
Wavelength
Ene
rgy
Out
put p
er s
econ
d
Blackbody Radiation LT
• Before Lecture (N=42): 12% correct• After Lecture (N=120): 16% correct• After Lecture Tutorial (N=80): 80%
correct
The diagram below shows Earth and the Sun as well as five different possible positions for the Moon. Which position of the Moon best corresponds with the phase of the Moon shown in the figure at the right?
Sun
NOT TO SCALE
Orbit of the Moon
Earth
A
B
C
D
E
What Causes Moon Phases
• Before Lecture (N=42): 5% correct
• After Lecture (N=127): 53% correct
The diagram below shows Earth and the Sun as well as five different possible positions for the Moon. Which position of the Moon best corresponds with the phase of the Moon shown in the figure at the right?
Sun
NOT TO SCALE
Orbit of the Moon
Earth
A
B
C
D
E
What Causes Moon Phases
• Before Lecture (N=42): 5% correct• After Lecture (N=127): 53% correct• After Lecture Tutorial (N=104): 72%
correct
H-R Diagrams and Spectral Class
A red giant of spectral type K9 and a red main sequence star of the same spectral type have the same
a) luminosity.
b) temperature.
c) absolute magnitude.
• Before Lecture (N=39): 41% correct
• After Lecture (N=86): 48% correct
H-R Diagrams and Spectral ClassA red giant of spectral type K9 and a red main sequence star of the same spectral type have the same
a) luminosity.
b) temperature.
c) absolute magnitude.
• Before Lecture (N=39): 41% correct• After Lecture (N=86): 48% correct• After Lecture Tutorial (N=83): 73%
correct
If our universe is expanding, what are the implications for the separation between two stars within our galaxy?
a) The two stars are moving farther apart. b) The two stars are moving closer together. c) The two stars are remaining approximately the
same distance apart.
Expansion of the Universe
• Before Lecture (N=39): 19% correct
• After Lecture (N = 85): 27% correct
If our universe is expanding, what are the implications for the separation between two stars within our galaxy?
a) The two stars are moving farther apart. b) The two stars are moving closer together. c) The two stars are remaining approximately the
same distance apart.
Expansion of the Universe
• Before Lecture (N=39): 19% correct• After Lecture (N = 85): 27% correct• After Lecture Tutorial (N=75): 56%
correct
Looking at Distant ObjectsImagine that you simultaneously receive the satellite transmission of two pictures of two people that live on planets orbiting two different stars. Each image shows the people at their 21st birthday parties. Consider the following possible interpretations that could be made from your observations. Which do you think is the most plausible interpretation?
a) Both people are the same age but at different distances from you.b) The people are actually different ages but at the same distance from you.c) The person that is closer to you is actually the older of the two people.d) The person that is farther from you is actually the older of the two people.
• Before Lecture (N=39): 53% correct
• After Lecture (N = 94): 51% correct
Looking at Distant ObjectsImagine that you simultaneously receive the satellite transmission of two pictures of two people that live on planets orbiting two different stars. Each image shows the people at their 21st birthday parties. Consider the following possible interpretations that could be made from your observations. Which do you think is the most plausible interpretation?
a) Both people are the same age but at different distances from you.b) The people are actually different ages but at the same distance from you.c) The person that is closer to you is actually the older of the two people.d) The person that is farther from you is actually the older of the two people.
• Before Lecture (N=39): 53% correct• After Lecture (N = 94): 51% correct• After Lecture Tutorial (N=77): 77% correct
Assumption #2: Lecture-Tutorials can intellectually engage students at a level
that is more effective than traditional lecture at promoting deep conceptual
change.• Post Lecture-Tutorial: questions
administered in subsets Pre-Course mean: 30% (nA=39,nB=42)Post-Lecture mean: 52% (n ~ 100)Post-Lecture Tutorial: 72% (n ~ 100)
Qualitative Results(focus group)
Students believe that the tutorials are one of the greatest strength of the class
• “I liked the Tutorial, they were very helpful. I am not a science person but feel that I learned a lot from them.
• “Why don’t all professors use tutorials during class?”• “The student interaction and tutorials are a very effective
approach to both teaching and learning. I guarantee most students will retain most of this course.”
“And then the tutorials? I don’t know who ever thought of that. But it’s really how classes should be taught….The tutorials [review concepts] because they break it down. You start with something so simple…and then it slowly gets to more.” –Marti
Qualitative Results(interview)
“I know the worksheets are real helpful. I found it sometimes hard to talk to as many people as I wanted to talk to and finish the worksheet in time.” – Joe
Qualitative Results(interviews)
For those of you who prefer to emphasize quantitative or mathematical reasoning we have
created - Ranking Tasks for Introductory Astronomy
But wait there is more!!
Results: over Eight Core Topics
0
25
50
75
100
Pretest
Post-Lecture
Post-Ranking TasksStudy Trial
Percent
Correct
( N ~ 100 ) Core Topics
Seasons
Kepler’s Laws
Star Magnitude & Distance
Motion of the Sky
Phases of the Moon
Gravity
Luminosity of Stars
Doppler Effect
Results: Averages for Eight Core Topics
0
25
50
75
100
Pretest
Post-Lecture
Post-Ranking TasksStudy Trial
Percent
Correct
32%
61%
77%
Both gains are statistically
significant* at .05 level.*Based on series of 8 mixed-factors ANOVA & Least Significant Differences tests.
( N ~ 100 )
Best results with lecture!
More difficult gains!
Results: Averages for Eight Core Topics
0
25
50
75
100
Pretest
Post-Lecture
Post-Ranking TasksStudy Trial
Percent
Correct
32%
61%
77%
( N ~ 100 )
Best results with lecture!
More difficult gains!
Post-Lecture to Post-Ranking Task:
Hake’s Normalized Gain = 0.41 (“moderately large effect”)
Cohen’s d = 0.62 (“Large effect”)
Other Effects of Ranking Tasks?
Gender?
High/Low Students on Pretest?
( Based on repeated factor ANOVA )
Ranking Tasks: Gender Effect?
0
25
50
75
100
Pretest
Post-Lecture
Post-Ranking TasksStudy Trial
Percent
Correct
( N ~ 100 )
Male Female
Ranking Tasks benefited both groups equally.
Ranking Tasks: High vs Low Pretests Groups?
0
25
50
75
100
Pretest
Post-Lecture
Post-Ranking TasksStudy Trial
Percent
Correct
( N ~ 100 )
11%
59%
76%
55%
64%
76%
Upper Median Group
Lower Median Group
Ranking Tasks benefited both groups equally.
Student Attitudes about Ranking Tasks
Students reported that …
“RTs contributed to my interest in course topics?” 52%
“RTs were enjoyable part of classroom experience?” 62%
“RTs helped me prepare for tests?” 72%
“RTs helped my learning of course material?” 83%
What Do You Do During a Small Group Activity?
• This is the chance to actually get to talk with your students about their learning of astronomy.
• Nudge groups with helpful question to steer their group discussion in the right direction.
• Ask two nearby groups to check their answer and to account for any differences to facilitate class interactions.
• Pull in non-participants by asking them what and why the other group members answered the way that they did.
• Offer thought provoking questions that help students engage with the concepts.
• Circle the wagons afterward ( i.e., debrief )
Always in pursuit of the TEACHABLE MOMENT
Always in pursuit of the TEACHABLE
MOMENT
Some Benefits to Doing Activities in Groups • Capitalize on students in your class who like to
socialize
• Revisit complicated concepts in ways besides lecture
• Actually talk to your students about concepts
• Emphasize learning the material that will be on test during class time
• Demonstrate to students that science is about doing stuff, a social endeavor that involves collaboration, not memorizing lists of facts
Critical Questions • What are YOUR beliefs about teaching and learning and how do
they guide your instruction?
• How do YOU want your students to be different as a result of the experiences you design?
• What do YOU know about the research on how STUDENTS learn?
• What strategies and resources are available that are proven to actively engage students and improve their understanding?
• What evidence would YOU accept that your students have made significant gains in conceptual understanding, as well as attitudinal and skill domains?
Just how does one create learning
sequences that motivate students to learn what
we want them to know?Creating the Learner-Centered Environment
How do you decide what to teach out of all that could be covered?
How do you choose which learning strategies to integrate into you class and make it meaningful for the
students?
You must choose to engineer this sequence by considering the answers to the following questions:
What is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
What feedback do you and your students need so you both know you are ready for the next steps and to guide your instruction?
What limited “interactive lecturing” do you need to do to set students up for successful learning experiences in their activities?
Example: Moon PhasesWhat is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
Now start thinking through the instruction sequence in terms of what a students needs to know to be able to answer this question.
If the moon is in the new phase today, how many of the moon phases shown above would the moon go through during the next 11 days.
A. only oneB. twoC. threeD. more than threeE. none
Now start thinking through the instruction sequence in terms of what a students needs to know to be able to answer this question.
Which of the following groups of moon phases can be seen (above the horizon) at 11:00 am?
A. Third Quarter, Waning Crescent, and Waxing CrescentB. New Moon, First Quarter, and Waxing GibbousC. Waxing Gibbous, Full Moon, Waning GibbousD. Waxing Crescent, First Quarter, Waxing Gibbous
Now start thinking through the instruction sequence in terms of what a students needs to know to be able to answer this question.
If the moon is highest in the sky this morning at 6:00 am, what phase will the Moon be in one week from now?
A. fullB. waxing crescentC. waning crescentD. waning gibbousE. new
Example: Moon Phases
What is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
Example: Moon PhasesWhat is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
Think Pair Share Questions Lecture Tutorials
Case Studies Ranking Tasks
Computer simulations & labs Writing Prompts
and many more
You actually need to work through the activity you choose before you can move forward or you will not be able to design the lecture that supports the activity.
Example: Moon PhasesWhat is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
What feedback do you and your students need so you both know you are ready for the next steps and to guide your instruction?
How many phases shown in the picture at the right will the Moon go through in one day?
How long does it take the Earth to complete one rotation? How far will the Moon have moved?
How long does it take the Moon to complete one orbit? How many of the phases will the Moon have gone through in this time?
How much of the Moons total surface is illuminated when it is in the phase identified?
How much of the illuminated surface of the Moon is visible from Earth when it is in the phase identified?
What time is it when the phase identified is highest in the sky? Rising? Setting? What phase will it be in in two weeks….
Questions that a student needs to be asked` (during the interactive lecture) :
Discovering the Night Sky
- Tail Gate Party #1 (a.k.a Exam #1 Review Session): From 4:00 pm – 6:00pm on Tues Sep 12th in RM N210 - Exam #1: Wednesday, Sep 13th Here – N210
How are the motions and positions of Earth and the Sun connected to what
happens on Earth?
• Earth’s rotation on its axis determines the length of the day.
• Earth’s orbit around the Sun determines the length of the year.
• The tilt of Earth’s rotational axis with respect to the plane of Earth’s orbit causes the seasons.
The changing phases of the Moon originally inspired the concept of the month
Moon Phase Names• New Moon• Waxing Crescent• First Quarter• Waxing Gibbous• Full Moon • Waning Gibbous• Third Quarter• Waning Crescent
Watch Movie at:http://aa.usno.navy.mil/graphics/Moon_movie.gif
http://antwrp.gsfc.nasa.gov/apod/image/9911/lunation_ajc.gif OR
http://www.solarviews.com/raw/moon/vmoon2.mpg
The Causes of Moon Phases
• Think to yourself about the answer to this question:
What causes the phases of the Moon?
Take out a piece of paper and quickly write out a brief answer.
Although the Moon is always
½ lit by the Sun, we see
different amounts of the lit portion from
Earth depending on
where the Moon is
located in its orbit.
How long does it take to complete the full cycle of Moon
Phases?A. About a dayB. About a weekC. About a monthD. About a yearE. None of the above
Check your answer with your partner!!
Although the Moon is always
½ lit by the Sun, we see
different amounts of the lit portion from
Earth depending on
where the Moon is
located in its orbit.
Let’s Watch some Moon Phase Animations!
Pay attention to where the Moon, Sun and Earth are located and how the Moon appears from Earth at each of these positions.
Look at how much of the Moon is illuminated when at each position.
Look at which side of the Moon is illuminated when at each position.
Although the Moon is always
½ lit by the Sun, we see
different amounts of the lit portion from
Earth depending on
where the Moon is
located in its month-long
orbit.
How many phases shown in the picture at the right will the Moon go through in one day?
How long does it take the Earth to complete one rotation? How far will the Moon have moved?
How long does it take the Moon to complete one orbit? How many of the phases will the Moon have gone through in this time?
How much of the Moons total surface is illuminated when it is in the New Phase? Full Phase?
How much of the illuminated surface of the Moon is visible from Earth when it is in the First Quarter Phase, Full Phase?
What time is it when the Waxing Gibbous Phase is highest in the sky, Rising? Setting? What phase will it be in one week later….
What time is it when the waxing
crescent moon is highest in the
sky? When does it first
rises? When does it set?
East
West
What time is it when the waxing
crescent moon is highest in the
sky? When does it first
rises? When does it set?
East
West
What time is it when the waxing
crescent moon is highest in the
sky? When does it first
rises? When does it set?
East
Wes
t
What moon phase would be
rising in the East at 3pm?
What Moon phase would be
setting in the West at 3pm?
East
West
The Moon Phase is highest in the sky at 9pm today. What phase will the Moon be in three weeks after today?
Lecture Tutorials: Cause and Predicting Moon Phases pgs (25 – 32)
• Work with a partner!• Read the instructions and questions carefully.• Discuss the concepts and your answers with one
another. Take time to understand it now!!!!• Come to a consensus answer you both agree on.• If you get stuck or are not sure of your answer,
ask another group.• If you get really stuck or don’t understand what
the Lecture Tutorial is asking, ask one of us for help.
Which Moon position (A-E), shown in the diagram at right, best corresponds with the moon phase shown below?
Sun
Orbit of the Moon
Ear
th
A
B C
D
E
Which of the situations shown above occurs at a time closest to sunset?
If the Moon were in the phase shown above, what phase would it be in two weeks later?
If the moon is in the Full phase today, how many of the moon phases shown above would the moon go through during the next 11 days.
A. only oneB. twoC. threeD. more than threeE. none
Which of the following groups of moon phases can be seen (above the horizon) at 3:00 am?
A. Third Quarter, Waning Crescent, and Waxing CrescentB. New Moon, First Quarter, and Waxing GibbousC. Third Quarter, Full Moon, Waning GibbousD. Waxing Crescent, First Quarter, Waxing GibbousE. None of the above is correct
Just how does one create learning
sequences that motivate students to learn what
we want them to know?Creating the Learner-Centered Environment
How do you decide what to teach out of all that could be covered?
How do you choose which learning strategies to integrate into you class and make it meaningful for the
students?
You must choose to engineer this sequence by considering the answers to the following questions:
What is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
What feedback do you and your students need so you both know you are ready for the next steps and to guide your instruction?
What limited “interactive lecturing” do you need to do to set students up for successful learning experiences in their activities?
Example: Doppler ShiftWhat is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
Use the four spectra shown at right for objects A-D, to answer the next question. Note that one of the spectra is from an object at rest (not moving) and the remaining spectra come from objects that are all moving toward the observer.
Object C
Object D
Object A
Object B
Which of the four objects A-D is moving with the fastest speed?a.Object Ab.Object Bc.Object Cd.Object De.More than one object is moving with the fastest speed.
Now start thinking through the instruction sequence in terms of what a students needs to know to be able to answer this question.
Example: Doppler ShiftWhat is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
- Example Doppler ShiftWhat is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
You actually need to work through the activity you choose before you can move forward or you will not be able to design the lecture that supports the activity.
Think Pair Share Lecture Tutorials
CLEA Ranking Tasks
Class-Action Project Light
and many more
Example: Doppler ShiftWhat is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
What feedback do you and your students need so you both know you are ready for the next steps and to guide your instruction?
BLUE RED
Spectrum A
Spectrum B
Questions that a student needs to be asked (during the interactive lecture) :
Consider the two spectra shown above of two different Stars A and B.
Which star appears blueshifted?Which star is moving toward you?If it actually turns out that both stars are redshifted relative to a stationary source of light – which star is moving the fastest?
Questions that a student needs to be asked` (during the interactive lecture) :
Consider the star moving counterclockwise.
• When was the star moving toward Earth?
• The star’s light is redshifted by the greatest amount when it is at position ______
• The star’s light would not appear shifted at all when it is at ____________
1
2
3
4
Earth
The Origin and Nature of Light
• Celebration of Knowledge #2 (aka Exam #2) is Wednesday October 11th in N210
• Tailgate Party (aka exam review) is Tuesday October 10th in N210 from 4-6pm here in N210
• HW #5 – Handed out in class September 29th on the topic of Luminosity Area and Temperature, and Due IN-CLASS Wednesday October 4th
The Origin and Nature of Light
• HW#6 – Masteringastronomy online homework on properties of light, atoms and the Doppler Shift. Available October 4th, Due October 11th by 9am.
What physical situation (or object) makes this spectrum?
What can we learn by analyzing starlight?
• A star’s temperature
• A star’s chemical composition
- peak wavelength of the spectral curve
- dips in the spectral curve or the lines in the absorption spectrum
• A star’s motion
The Doppler Effect
• Definition: “The change in wavelength of radiation (light) due to the relative motion between the source and the observer along the line of sight.”
Astronomers use the Doppler Effect to learn about the radial (along the line of sight) motions
of stars, and other astronomical objects.
Real Life Examples of Doppler Effect
• Doppler Radar (for weather)
• Airplane navigation system
• Speed Detection used by Law Enforcement Officers…
• Ok, anything with radar!!!
The Doppler Effect
• Definition: “The change in wavelength of radiation (light) due to the relative motion between the source and the observer along the line of sight.”
Doppler Effect• When something which is giving off light moves
towards or away from you, the wavelength of the emitted light is changed or shifted
V=0
Doppler Effect
• When the source of light is moving away from the observer the wavelength of the emitted light will appear to increase. We call this a “redshift”.
Doppler Effect
• When the source of light is moving towards the observer the wavelength of the emitted light will appear to decrease. We call this a “blueshift”.
The Doppler Effect
• Definition: “The change in wavelength of radiation due to relative motion between the source and the observer along the line of sight.”
Doppler Effect• “Along the line of sight” means the
Doppler Effect happens only if the object which is emitting light is moving towards you or away from you.– An object moving “side to side” or
perpendicular, relative to your line of sight, will not experience a Doppler Effect.
Not moving
Redshift
Blueshift
Star moving away from you
Star moving toward you
Astronomy Application
Doppler Shifts• Redshift (to longer wavelengths): The source is
moving away from the observer• Blueshift (to shorter wavelengths): The source is
moving towards the observer
= wavelength shift
o = wavelength if source is not movingv = velocity of source
c = speed of light
c
v
0
BLUE RED
Spectrum A
Spectrum B
BLUE RED
Spectrum A
Spectrum B
Consider the two spectra shown above of two different Stars A and B.
Which star appears blueshifted?Which star is moving toward you?If it actually turns out that both stars are redshifted relative to a stationary source of light – which star is moving the fastest?
1
2
3
4
Earth
1
2
3
4
Questions that a student needs to be asked :
Consider the star moving counterclockwise.
• When was the star moving toward Earth?
• The star’s light is redshifted by the greatest amount when it is at position ______
• The star’s light would not appear shifted at all when it is at ____________
1
2
3
4
Earth
Doppler Shift Lecture Tutorial Handout
• Work with a partner!• Read the instructions and questions carefully.• Discuss the concepts and your answers with
one another. Take time to understand it now!!!!• Come to a consensus answer you both agree
on and write complete thoughts into your LT.• If you get stuck or are not sure of your answer,
ask another group.
The Doppler Effect causes light from a source moving away to:
1. be shifted to shorter wavelengths.
2. be shifted to longer wavelengths.
3. changes in velocity.
4. Both a and c above
5. Both b and c above
You observe two spectra (shown below) that are redshifted relative to that of a stationary source of light. Which of the following statements best describes how the sources of light that produced the two spectra were moving?
BLUE RED
Spectrum A
Spectrum B
1. Source A is moving faster than source B.
2. Source B is moving faster than source A.
3. Both sources are moving with the same speed.
4. It is impossible to tell from looking at these spectra.
A bright star is moving toward Earth. If you were to look at the spectrum of this
star, what would it look like?
1. an absorption spectrum that is redshifted relative to an unmoving star
2. an emission spectrum that is redshifted relative to an unmoving star
3. a continuous spectrum that is blueshifted relative to an unmoving star
4. an absorption spectrum that is blueshifted relative to an unmoving star
5. a continuous spectrum that is redshifted relative to an unmoving star
What can we learn by analyzing starlight?
• A star’s temperature
• A star’s chemical composition
- peak wavelength of the spectral curve
- dips in the spectral curve or the lines in the absorption spectrum
• A star’s motion- Doppler shift
Solving Our "Problems"
Work in a group to complete the following assignment:
• You are going to be teaching about the subject of ____________
• What is the highest level question(s) you would want your students to be able to answer? Choose a question(s) that would demonstrate that they really understand?
What activities and experiences do your students need to engage with in order to develop their understanding?
What feedback do you and your students need so you both know you are ready for the next steps and to guide your instruction?
What limited “interactive lecturing” do you need to do to set students up for successful learning experiences in their activities?