Here is my second draft with better timing.
this is a quick demo of how you can use SAM animation from Tufts to create short stop action videos that demonstrate understanding. it took me about an hour, maybe less, to make this. i could make another one a lot faster now.it's not too great, but here's my first draft of what is possible. i think a white board with a good marker might come out better. or just a sharpie on paper.go to http://www.samanimation.com/
to download the free software.