*[[http://www.youtube.com/watch?v=qYZF6oIZtfc| 1 minute version]]

*[[http://www.youtube.com/watch?v=nKIu9yen5nc|5 min version]]

*[[http://www.youtube.com/watch?v=dU1xS07N-FA|9 min version]]

[[https://www.youtube.com/watch?v=3Ky9MZyL8r4|AP Comp Sci in 60 minutes Video]]