from intro to function to conic sections each topic is explained so that you can teach yourself. For some sections there are drills to help you review what your learned and to help you study and solidify your current knowledge.
This is a great website for learning about the graphs of rational functions. Shows you everything from the horizontal and vertical asymptote to the intercepts. It sketches it all out for you which makes it ten times easier.
This website gives you an understanding of how to calculate average rate of change. It also demonstrates some tools to use on your calculator in order to make problems easier.