@BoingBoing That teacher needs to have his or her ass kicked.
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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@BoingBoing sigh. The teacher is right. There is, mathematically, a difference. -
@dianamoher@BoingBoing What? Multiplication is commutative. So is addition. -
@FoxotCW@BoingBoing not visually. 5 x 3 is 5 groups of 3. 3 x 5 is 3 groups of five. Only the answer is the same. -
@dianamoher@BoingBoing Mathematically, they are the same. A lesson that suggests otherwise is confusing and misleading students. -
@FoxotCW@BoingBoing strangely, it is precisely this change in instruction that allowed more understanding.
End of conversation
New conversation -
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