prev

next

of 27

View

218Category

## Documents

Embed Size (px)

DESCRIPTION

The Importance of Mathematical Tasks “…a teacher of mathematics has a great opportunity. If he fills his allotted time with drilling his students in routine operations he kills their interest, hampers their intellectual development, and misuses his opportunity.

Thinking about the ways students encounter mathematics Why Focus on Tasks? Classroom instruction is generally organized and orchestrated around mathematical tasks The tasks with which students engage determine what they learn about mathematics and how they learn it The inability to enact challenging tasks well is what distinguished teaching in the U. S. from teaching in other countries that had better student performance on TIMSS The Importance of Mathematical Tasks a teacher of mathematics has a great opportunity. If he fills his allotted time with drilling his students in routine operations he kills their interest, hampers their intellectual development, and misuses his opportunity. But if he challenges the curiosity of his students by setting them problems proportionate to their knowledge, and helps them to solve their problems with stimulating questions, he may give them a task for, and some means of, independent thinking. Polya, 1973/1945 The Importance of Mathematical Tasks different tasks will provoke different levels and kinds of student thinking Not all tasks are created equal, and different tasks will provoke different levels and kinds of student thinking. Stein, Smith, Henningsen, & Silver, 2000 The Importance of Mathematical Tasks Task-Focused Activities Distinguishing Distinguishing between high and low cognitive demand mathematics tasks Distinguishing Maintaining Maintaining the cognitive demands of high-level tasks during instruction Maintaining Task-Focused Activities Distinguishing Distinguishing between high and low cognitive demand mathematics tasks Distinguishing Popsicle Sticks Empty Number Line Popsicle Sticks Example Say, We have nine ones. Lets put the nine ones using the popsicle sticks in the ones place (cup). The problem is Lets count three more popsicle sticks and add them to the nine ones. Popsicle Sticks Example Say, Oh no! Whats wrong with the ones place? Students respond, There can only be nine ones in the ones place. We have to regroup by making a group of ten. Count the ten popsicle sticks with the class and make a group of ten. Popsicle Sticks Example Say, How many groups of ten do we have in the tens place? How many ones do we have in the ones place? We have which equals one group of ten and two ones. Popsicle Sticks Solve Summarize: We learned addition with regrouping one digit, how we can do regrouping with popsicle sticks, and how we use regrouping every day. Empty Number Line Jerry made a drawing using an empty number line to solve this problem Zena also used an empty number line but her solution does not look like Jerrys solution. Explain how Jerry solved the problem. Explain how Zena solved the problem. Are both solutions correct? How do you know? Reflecting.. How are the two tasks similar? How are the two tasks different? Importance of Distinguishing Low Cognitive Demand Tasks Popsicles Sticks High Cognitive Demand Tasks Empty Number Line Sorting Tasks You will need the complete set of the Task Sort Card set (File name: Task Cards (PV)082909). Before you continue, make sure you have each task as a separate sheet so you can move them individually as you sort them. Also make sure you have the Task Sort Chart to record your decisions. Sorting Tasks Make two piles: those tasks that your group considers to be high cognitive demand tasks and those tasks that your group considers to be low cognitive demand tasks. As you sort, take notes on your thoughts about what makes a task high or low in terms of cognitive demand. Some Features of High Cognitive Demand Tasks A high cognitive demand task begins where the students are (zone of proximal development; scaffolding) The problematic or engaging aspect of a high cognitive demand task is due to mathematics that students are to learn. A high cognitive demand task requires justifications and explanations for answers and methods. Task-Focused Activities Maintaining High cognitive demand tasks or activities are the vehicle through which the curriculum can be developed. Maintaining the cognitive demands of high-level tasks during instruction affects the learning that occurs. Maintaining The Mathematical Tasks Framework Adapted from Stein, Smith, Henningsen, & Silver, 2000, p. 4 Maintaining The Mathematical Tasks Framework Adapted from Stein, Smith, Henningsen, & Silver, 2000, p. 4 Maintaining The Mathematical Tasks Framework Adapted from Stein, Smith, Henningsen, & Silver, 2000, p. 4 Maintaining The Mathematical Tasks Framework Adapted from Stein, Smith, Henningsen, & Silver, 2000, p. 4 Maintaining The Mathematical Tasks Framework Adapted from Stein, Smith, Henningsen, & Silver, 2000, p. 4 Maintaining The Mathematical Tasks Framework Adapted from Stein, Smith, Henningsen, & Silver, 2000, p. 4 Maintaining The Mathematical Tasks Framework Adapted from Stein, Smith, Henningsen, & Silver, 2000, p. 4

Recommended

View more >