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America's Highway Numbering System Is Hiding A Giant Math Puzzle

Believe it or not, highway numbers actually make sense. Here's the logic behind odd and even routes, and why the system isn't ...
Edutopia

Strategies to Help Build Students’ Math Fact Fluency

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 ...