- Summation Notation - Here is a terrific summary by Prof. James Aspnes of the Yale CS department.
- Exponential and Log Functions - Graphs and Approximations
- Mathematical Induction - Here is a clear and concise exposition, with several examples, by Prof. Victor Adamchik of the CS department at Carnegie Mellon.
- Double Integrals - Here is a beautiful lecture by Prof. Denis Auroux of the Berkeley Math department, recorded when he was at MIT. If you have studied double integrals before, you can start at around 15:30.