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Sal Khan on U-substitution
I still need to save my flipchart as a pdf to make a lesson out of it.
In the meantime, if you would like to get a headstart (actually just keep up with our Edline calendar!), you can start with some Khan videos here.
Introduction to U-Substitution
This video explains the concept of substitution and shows one example and the 5.5 homework.
5-5 U-substitution Examples
These are three more examples - two indefinite integrals and one definite integral.
5-5 U-substitution Video #3
Here are the last two examples from the notes for 5-5.