Young chemists discover that all solids are not created equal with the help of this short instructional video. Taking a microscopic look at matter, students learn how to classify solids based on the type of bonds that are responsible for...

Here’s a hugely important video that is difficult to understand and impossible to show in most classrooms. “China is complicated,” says Michael Anti, a Chinese blogger. Anti takes viewers behind the Chinese Internet firewall, to reveal...

Sal gets to the heart of this video, clarifying that it's important to understand math "so you can apply it later on and not have to relearn everything every time." True to his word, Sal demonstrates ways to solve logs and exponents more...

Starting with a set of values for the x and y variables, this video shows how to tell whether these points determine a linear or non-linear function. Sal first defines linear functions in terms of the change in y over the change in x,...

Use division and factoring to determine the leading one coefficient. This presentation thoroughly explains how to factor a trinomial to determine its common factors.