Other resources for basics are summarized in Getting started with After Effects II.
Update: Todd Kopriva summarizes these classes and adds links to pages in AE Help that give more detail about each subject. He adds:
"One of the things that makes this series stand out from other tutorials is that it spends a lot of time on fundamentals of animation and motion graphics, not just on the specific features of After Effects, and not just on the creation of a specific result or look. These fundamentals can be used every day, for every project. This is real teaching."