Forget hunting for a tape measure or a protractor. Use your Android phone camera and sensors to handle different types of measurements easily.

Measure with centimeter cubes to find the length of reptiles. Add & subtract within 100. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. What do you ...

How innovations in visibility, usability, and smart sensing are changing who uses tools—and how. For centuries, measurement tools have been essential to architecture, engineering, construction, real ...