Lecture 3 is modified from a lecture that I gave to teachers in 2008 and that original lecture is still on line:

http://oregonteacherscholars.pbworks.com/Archive+of+2008-9+Series

You need to scroll down to topic four and click on the first link, which says "Melinda Hutson lecture slides".  You'll get almost the same lecture as in class.  I'm not going to take the time to see how this lecture differs from the one in class.  That's up to you.