An astrobiologist and a physicist explain how mathematics is universally critical to helping understand nature and the cosmos in this video from KAET. In the accompanying classroom activity, students discuss the mathematics in the video, including the use of algebra, and then practice writing, reading, and evaluating algebraic expressions in a class bingo game. [5:45]

Watch network engineer Diana Tootle explain how she uses math in her work in this video from KAET. In the accompanying classroom activity, students watch the video and then complete an activity involving an aspect of math that Ms. Tootle discusses: converting numbers between base 2 and base 10. [4:37]

Simplify expressions with rational numbers using the distributive property of multiplication. This student-generated video focuses on using the distributive property to create equivalent expressions when multiplying by negative numbers and fractions, which can then be simplified.

In this video segment from Cyberchase, Hacker and the CyberSquad race to reach the Good Vibration on staircases that grow at different rates and have steps of varying sizes.

This video will walk you step-by-step through the process of solving one-step linear equations by multiplication and division. [2:39]

Let's practice some two step equations, some of which require merging terms and using the distributive property. [13:50]

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Students are introduced to algebraic expressions that use more than one variable and have multiple solutions. They figure out combinations of two items at different costs, with each combination adding up to 100.

Find a quick, concise explanation of simplifying expressions. Examples are given and clearly explained.