I really like the overlay of physics information in the video. It is so much easier to explain to students what acceleration is by showing it rather than asking

I really like the overlay of physics information in the video. It is so much easier to explain to students what acceleration is by showing it rather than asking students to imagine "the second derivative of the position function r(t)=(x(t),y(t))." Check out the software they used: http://www.cabrillo.edu/~dbrown/tracker/ http://www.cabrillo.edu/~dbrown/tracker/