One more thing to check out....

..... after you've done the homework (on the previous blog entry):

http://www.youtube.com/watch?v=kBmRNkM9saA&feature=related

(That's from my class.)


These are not from my classes:

http://www.youtube.com/watch?v=JgKzx3tZ59A&feature=related

http://www.youtube.com/watch?v=YedgubRZva8&feature=related

http://www.youtube.com/watch?v=DGSU5rcHmRQ&feature=related