Pre-Algebra class was completely silent yesterday. As students arrived I put my finger to my lips and zipped them, pointed toward their seats and made the universal gesture for sit down and read (i.e. I put my hands together as in prayer then opened them like a book and stared at them.) Clever students that [...]

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Watch these two videos on the Pythagorean Theorem, and tell me which you think is better and why.

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