Read the die to find out how many repetitions of each exercise to do. Then exercise along with the kids in the video to improve your number recognition and fitness level at the same time. [5:37]

This lesson discusses the relationship between positive and negative numbers. It is 1 of 13 in the series titled "Relating Positive and Negative Numbers."

Video tutorial explains how to solve word problems comparing two numbers that are less than 10. [3:13]

In this lesson, you will learn about locating rational numbers by using a number line. [3:50]

In this lesson, you will learn how to create numbers that are larger or smaller than a given number by comparing the values of the digits. [6:17]

This is the second video of a lesson on rational numbers. Students are shown how to plot positive and negative fractions and decimals on a number line, and how to use long division to convert fractions to decimals. [8:08]

See how the different categories of numbers all relate to one another by watching this tutorial. [6:05]

In this lesson students learn about ordering numbers expressed as decimals, fractions, and percentages.

Sal shades visual fraction models to compare fractions. [2:58]

This lesson discusses the relationship between positive and negative numbers. It is 10 of 13 in the series titled "Relating Positive and Negative Numbers."

This lesson discusses the relationship between positive and negative numbers. It is 2 of 13 in the series titled "Relating Positive and Negative Numbers."

This lesson discusses the relationship between positive and negative numbers. It is 4 of 13 in the series titled "Relating Positive and Negative Numbers."

This lesson discusses the relationship between positive and negative numbers. It is 5 of 13 in the series titled "Relating Positive and Negative Numbers."

This lesson discusses the relationship between positive and negative numbers. It is 8 of 13 in the series titled "Relating Positive and Negative Numbers."

Sal orders three objects by length, and compares the lengths of two objects indirectly by using a third object. [2:37]

This QuickTime movie provides an opportunity to learn about how to compare amounts and data from a variety of sources. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.