Ask a million questions about everything. If you aren't sure, the rule of thumb is to ask. If there is a concept you don't understand yet, ask him about it or they will never go in-depth enough on it.

As you go over multiple choice questions, scribble down notes on why the answer is correct or false. 

For math based questions, the way you go about solving the problem is more important than the actual answer. It is still important to get the right answer, but a faulty calculation is more easily amended than a faulty understanding. Besides, they give consolation points for the steps of the process.