Helping students to develop math fluency takes more than just flash cards. It requires teaching them how to think about numbers. And while that may seem daunting, most kids enjoy sharpening their math ...
No, aliens had nothing to do with a winding 1.5-kilometer-long path of holes. First used as a market, the Inca then repurposed it for tax collection.
Mathematician Grigori Perelman solved the Poincaré conjecture, and then rejected the $1 million prize that came with it.
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