With so much water everywhere, how is it that people around the world don't have clean water for drinking and bathing? Part three in a seven-part series describing Earth's water resources introduces the class to the process of water...

Practice makes the concepts of naming much easier. Here, Sal runs through 5 even more complicated examples, while encouraging viewers to do the same. The main development explained here is the addition of multiple types of side chains to...

Protecting buildings, bridges, and roadways from damage during an earthquake is an important task for engineers. Discover how one lab goes about testing the safety of existing and yet-to-be-built structures with a short video. See some...

Learn from teachers at the Florida School for the Deaf and Blind on ways to reach students of different learning styles and ability levels, as well as how to accommodate learners with special needs in a general education classroom setting.