In this segment from *Cyberchase*, Digit must make a straight line between two points and then follow the path created.

Let's find an exact way to measure an angle using a protractor. We'll also learn about acute angles.

If you know the perimeter and the length of a rectangle, you can figure out the width.

Comparing fractions? Try simplifying them first then finding a common denominator. The result are two fractions you can really compare.

Watch as Sal gives us a basic example of how to rewrite a fraction as a decimal.

Learn about regrouping numbers into various place values

To make the "expanded" form of a number, break it down to its ones, tens, hundreds, and other place values.

This is getting fun! Let's multiply four digits times one digit. Remember to carry!

In this program students learn to determine if a direct variation exists for the data in each table. Instructor: Cryshel Whitehead (The transcript of this program is available for download at the link below.)

In this video, learn how using the Pythagorean theorem can help people solve real-world problems involving distances. In the accompanying classroom activity, students develop their problem-solving, spatial reasoning, and geometry skills by putting the Pythagorean theorem to use. After a brief discussion about how to use the theorem to find the distance between two points on a coordinate grid, students partner up and play a game in which they generate (and then calculate the distance between) two or more points on the grid. As the game increases in complexity, students begin working in all quadrants and begin identifying multiple triangles that they can use to determine the distance between points.