In this lesson students will listen to a story of a boy with chicken pox and participate in a class discussion of chicken pox and what to do when you have a contagious disease. They will incorporate math by graphing who in the class has had the disease. They will draw chicken pox on an outline of a child, then practice mathematical concepts with the spots.

This short video and interactive assessment activity is designed to teach fifth graders about choosing the correct unit with liters or milliliters.

This short video and interactive assessment activity is designed to teach fourth graders about choosing the correct unit with liters or milliliters.

The purpose of this task is for students to find different pairs of numbers that sum to 7.

Accuracy of measurement in navigation depends very much on the situation. If a sailor's target is an island 200 km wide, sailing off center by 10 or 20 km is not a major problem. But, if the island were only 1 km wide, it would be missed if off just the smallest bit. Many of the measurements made while navigating involve angles, and a small error in the angle can translate to a much larger error in position when traveling long distances.

This short video and interactive assessment activity is designed to teach fifth graders about coins and bills.

This short video and interactive assessment activity is designed to teach fourth graders about combining units using addition and subtraction (metric units).

A brief look at how money has evolved over time from being printed on valuable substances (commodity money), to merely representing those valuable substances (commodity-backed money), to not representing anything at all (fiat money). Created by Grant Sanderson.

This short video and interactive assessment activity is designed to teach second graders about making observations about capacity (metric units).

This short video and interactive assessment activity is designed to teach second graders about comparing the capacity by formula in quarts, pints and cups.

This short video and interactive assessment activity is designed to teach second graders about comparing gallons and quarts by pictures.

This short video and interactive assessment activity is designed to teach first graders about multiple object lengths (english measurement).

This short video and interactive assessment activity is designed to teach fifth graders about multiple object lengths (english units).

This short video and interactive assessment activity is designed to teach second graders about comparing gallons, pints, and quarts by formula.

This short video and interactive assessment activity is designed to teach fourth graders about comparing capacities in compound units using words (english units).

This short video and interactive assessment activity is designed to teach second graders about comparing capacity with pictures (english units).

This short video and interactive assessment activity is designed to teach third graders an overview of conversion among units of measure.

This short video and interactive assessment activity is designed to teach third graders about comparing cups and pints by formula.

This short video and interactive assessment activity is designed to teach second graders about comparing cups and pints by pictures.

This short video and interactive assessment activity is designed to teach third graders about comparing cups and quarts by formula.