The College Board Website on AP Biology - Official College Board Site
MIT Resources for AP Biology - You can observe introductory biology lectures at MIT
University of Arizona Biology Project - A great resource, has a lot of interactive quizzes that provide tutorials and guidance.
Practice Quizzes - Based on the Campbell book (they may go into more detail than we need to worry about)
Unit Specific Links
Chemistry of Life Flashcards (note there are some terms on here we skipped in lecture)
Explanation on the Origin of Life - I do not condone the video maker's attitude against creationism. However, the animated explanation of how life could have arisen is very worthwhile