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david-coulson documents
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Area Of A Circle Simplification
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Dave steam 10 (the little engine)(29)
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11 damn lies we tell our kids (about maths)
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11 damn lies we tell our kids (about maths)
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Yuctoborian : A math shortcut for squaring numbers that end in 5
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Dc32343
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Seeder 1
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Number crunching tons of examples
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Optics
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Triangulation (ppt)
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How to make maths really boring
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V = IR (and all that)
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Matrix lesson
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Venn style thinking
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Weird trig 5
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Multiplication using antidigits
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A different way to divide
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Square roots close range approximation
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Divide by eleven
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A look at projectile motion
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Statue of ino problem
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