Here are my lecture notes from my days as a teaching assistant at Caltech. The notes contain material on calculus, functions of a complex variable and ordinary and partial differential equations.
Here is my thesis on efficient solutions of static Hamilton-Jacobi equations.
The entire source (LaTeX files, graphics etc.) is also available as a
zip file.
Mathematica
I have written a set of tutorial Mathematica notebooks that I used in teaching a Mathematica class. You can follow the link to browse the notebooks or grab all of them in a zip file.