Introduce your first grader to centimeters by helping her measure some familiar things: school supplies!

Does your child know the difference between centimeters and inches? Help him get to know these units of measurement by using a ruler to measure everyday things.

Do your kids like helping around the house? Let them flex their metric muscles by helping them measure each item in centimeters using the cut-out ruler.

Decide when to use each measurement tool in this engaging math worksheet!

Don’t let estimating and measuring bug you—strengthen your skills with this fun second-grade worksheet!