From Dale Basler, via Lab Out Loud: http://laboutloud.com/2010/06/a-dashboard-physics-lesson/

For several years I’ve turned my students loose with a rather boring video of my speedometer as I traveled around town.

The best part of this video is that I don’t need to come up with an assignment. I just play the video. It doesn’t take more than a minute for questions to start bubbling out of the students?

• How long did you do this?
• Where did you go?
• How far did you drive?

And there it is. A physics lesson. I send the students off with a challenge: “tell us everything you can about my trip.”

Read on: http://laboutloud.com/2010/06/a-dashboard-physics-lesson/