How far back in time can scientists see? Currently, the earliest photo of the universe is the cosmic microwave background, but math models prove the universe existed long before that time. An installment from the SciShow Space series...

What a fresh approach to learning about water! Chef Jamika Pessoa explains the chemical composition of this vital compound, what happens when heat is added or removed, and how much water is contained in different organs and...

This video demonstrates how to use a kitchen scale to measure the mass of common items found at home in grams and kilograms. [7:07] CCSS.Math.Content.3.MD.A.2 Measure and estimate liquid volumes and masses of objects using standard units

This video will help children with measuring liquids in quarts and gallons. When both pairs of agents--Olive and Otto versus Oren and Olaf--capture pieces of the Blob, they visit the Mathroom to see who has more.

In this lesson, you will learn how to solve multiplication and division word problems about mass by drawing pictures. [3:58]

In this lesson, you will learn how to solve multiplication and division word problems about volume by drawing pictures. [3:34]

Learn about units of measure for liquids in this fun clip from the Odd Squad. When a gallon of blob is loose in headquarters, Otto and Olive are determined to find it before their rivals do.

In this lesson, you will learn how to solve word problems about volume by adding and subtracting on a number line. [4:10]