This is a brilliant movie/lecture by Prof Emeritus Albert on %ages and what "growth" implies to the world. Its really retro but still its brilliant. The other thing is that you may brush up on your arithmetics as well... I did...

http://video.google.com/videoplay?docid=-5051121482067161853
http://video.google.com/videoplay?docid=602513421855929910
http://www.youtube.com/watch?v=yQd-VGYX3-E
http://www.youtube.com/watch?v=qHuwgxrTKPo
http://www.youtube.com/watch?v=-3y7UlHdhAU
http://www.youtube.com/watch?v=RyseLQVpJEI
http://www.youtube.com/watch?v=VoiiVnQadwE