In construction and artisanship, knowing how to read a ruler accurately determines the difference between a quality product and a substandard one. Luckily, reading a tape measure is easy and allows ...

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 ...

Admit it, the iPhone in your pocket is like a Swiss Army Knife - it’s easy to carry and has a tool for almost every job; oh yeah, and it makes phone calls too. A ruler isn’t something you need all the ...