There are many purposes that spots and stripes serve in nature, but how they form has been more of a mystery to scientists.
1. Fast and Slow Piles. This works well as a starting or closing activity. Students sort math fact cards into fast and slow piles. This visual way of tracking facts highlights which facts come ...
The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, uses number ...
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