Illustration that uses triangles to measure the distance across a river.

Illustration that uses triangles to measure the distance across a river.

Illustration that uses triangles to measure the distance across a river.

Illustration of a child measuring with rulers that can be used to write mathematics story problems involving…

Illustration of two children holding rulers that can be used to write mathematics story problems involving…

Illustration of children holding rulers that can be used to write mathematics story problems involving…

Five students are learning how to use scales to measure a book. They have balanced the book with some…

Illustration comparing the fundamental units of measure 1 square yard and 1 square meter.