Then we nearly completed our 4.5 notes on the u-substitution method. The idea behind this method is to take a complicated problem to integrate and rewrite it as a simpler problem.
Want to watch more examples, use the link below
http://www.youtube.com/watch?v=qclrs-1rpKI
http://www.youtube.com/watch?v=x06V9xuLdqg
Khan Academy link below has multiple examples. Click on the tabs on the left for more.
http://www.khanacademy.org/math/calculus/integral-calculus/u_substitution/v/u-substitution-example-2
Looking for some more practice with this method, use the link below
http://archives.math.utk.edu/visual.calculus/4/substitutions.3/i
HW: Complete WS Circuit Training and do 1 - 10 on WS Integration by Substitution