Here are some additional references on tensors which might be of interest.
Here are some practice problems for the midterm and solutions.
Here are the solutions to the midterm.
Here are some practice problems on differential forms and Riemannian geometry for the exam. (Updated on Dec. 7th.) Here are the solutions.
I will have extra office hours leading up to the exam as follows:
Assignment 1, due Oct.4, 2011. Here are the solutions.
Assignment 2, due Oct.18, 2011. (Updated on Oct 5th.) Here are the solutions.
Assignment 3, due Nov.3, 2011. Here are the solutions.
Assignment 4, due Nov.17, 2011. Here are the solutions (by David Riveros Pacheco).
Assignment 5, due Dec.1, 2011. Here are the solutions (by David Riveros Pacheco).