Create your own centimeter ruler. Then, estimate and measure with lengths with it. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Think through ...

You’re moving, or maybe you’ve just got a lot of stuff, and you need to rent out a storage container—but you have no real sense for how much storage you need. Keep reading, because understanding the ...

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When elementary school students in her district struggle in math, Elizabeth Abel wants to get them support as soon as possible. That’s because addressing students’ gaps in kindergarten, 1st, and 2nd ...