# Rational Numbers

## What is an Integer? | PBS Math Club

Icon: Explore positive and negative integers and how they are used to track "likes" and "dislikes" on YouTube. This episode of Math Club defines integers, explains the difference between positive and negative numbers, shows how integers are represented on a number line, and demonstrates how to determine integers with greater value.

## Negative Numbers: Introduction

Icon: An introduction to negative numbers, including addition and subtraction.

## Multiplying Positive and Negative Numbers | PBS Math Club

Icon: Learn about multiplying positive and negative numbers with this eccentric family. This episode of Math Club illuminates the simple rules for multiplying signed numbers.

## Comparing Integer Values | PBS Math Club: InstaCram

Icon: Defining integers and giving examples of numbers that are not integers in 8 seconds with InstaCram from the Math Club.

## Absolute Value: Absolute Value and Number Lines

Icon: One way to think of absolute value is the distance it is from zero. To do that, a number line comes in handy.

## Opposites | PBS Math Club: InstaCram

Icon: Defining opposite numbers in 15 seconds using positive and negative integers on a number line with InstaCram from the Math Club.

## Quiz: Adding and Subtracting Signed Numbers | PBS Math Club

Icon: Challenge your knowledge of adding and subtracting positive and negative integers with this quiz from the PBS Math Club.

## Negative Number Basics: Negative Numbers and Number Lines Examples

Icon: Given a few negative numbers on a number line, determine what negative numbers are elsewhere on the number line.

## Graphing Points on a Coordinate Plane: Harry’s Feet Compete

Icon: In this video from Cyberchase, Harry decides he needs to start a regular workout schedule. He uses a graph to record his progress. In the accompanying classroom activity, students play a ball-balancing game and record their attempts on a graph to build on the concepts presented in the video. This resource is part of the Math at the Core: Middle School Collection.

## Adding Negative Numbers | PBS Math Club

Icon: Introducing adding positive and negative integers, additive inverses, visualizing addition with a number line, and the commutative property of addition the Math Club parodies Star Wars and Mean Girls.