Rational Numbers

Manipulating Graphs

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Watch how a graph is altered when key elements of the equation change. This lesson focuses on how to manipulate the equation of a line in slope intercept form to match the graphs provided deepening the understanding of both the slope and y intercept's role in the expression. This video was submitted through the Innovation Math Challenge, a contest open to professional and nonprofessional producers.

I <3 Math: Integers - How do Positive and Negative Numbers Relate to Sea Level? (Video-Only Clip)

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Providing the opportunity to apply knowledge about positive and negative integers by narrating the clip. Students can describe how integers are represented on a number line as they relate to the dolphin jumping in and out of the water. An I <3 Math clip with no audio.

Negative Number Basics: Ordering Negative Numbers from Least to Greatest

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Is -40 bigger than -10? When ordering negative numbers, don't get stuck on the "amount" of the number. Think about what that negative sign really means!

Simplifying an Algebraic Expression

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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.

This resource is part of the Math at the Core: Middle School collection.

Game Over Gopher

Hungry gophers are after the prized carrot. Defend the carrot by placing units on a coordinate grid. A finalist in the 2012 Serious Games Showcase & Challenge.

Rational Numbers: We Are Proportional (2007)

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This program provides students with a lively introduction to key concepts involved with triangles and quadrilaterals. It includes defining rational numbers as the ratio of two integers, defining rational numbers as a terminating or repeating decimal, the concept of proportional reasoning and examples of converting between decimals and rational numbers.

Grade Level: 
Rational Numbers: We Are Proportional