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 don’t need a calculator to quickly find the center of something that’s an odd length, such as 37 5/8 inches. The smart folks at This Old House show us two ways to quickly divide a length in half ...

Egan J Chernoff receives (and has received) funding from Social Sciences and Humanities Research Council. University of Saskatchewan provides funding as a founding partner of The Conversation CA.

In the past few years, I’ve moved more than once. Time and again, I have had to measure rooms or furniture and then check whether I can arrange everything just as I had planned. When we use a tape ...