This is why you're learning differential equations

Tired of the same old evening news? Well, look out Katie, Charlie and Brian! If researchers at Northwestern University have their way, the news will become a lot more interesting. With funding from the National Science Foundation,...

This video explains how to subtract negative numbers using integer chips. It demonstrates the concept of zero pairs and shows how to add and subtract integers with like and different signs.

A day does not go by without using simple machines. This program explores the six major types of simple machines with practical, colorful examples of each. Vivid video footage illustrates how each of the following simple machines works...

In this video, the teacher explains how readers can match their voice to different end punctuation marks, such as periods, exclamation points, and question marks.

In this video, students learn how to represent algebraic relationships in different ways, such as word problems, tables, equations, and graphs. The example used is Stephanie's necklace, where the number of links (x) affects the total...