You can't go through algebra without seeing quadratic functions. The graphs of quadratic functions are parabolas; they tend to look like a smile or a frown. In this tutorial, get introduced to quadratic functions, look at their graphs, and see some examples of quadratic functions!
What does the vertex form of a quadratic equation look like, and what does it tell you about the equation's graph? Watch this tutorial to unlock the secrets of the vertex form!
If you're learning about probability, conditional probability is bound to come up. This tutorial explains conditional probability and shows you how to find it!