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.