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Published on Apr 7, 2010
Several people have asked me how I made those videos in which I walk behind the screen and in front of the screen (See linked videos "April Fools: Math Class Shadow" and "2009 Halloween Math Class"). This video is a "how-to" video that describes the process.
Here's the equipment a former student, Andrew Staver, and I used: a Panasonic miniDV camcorder (although the newer models would be better), a Sony personal voice recorder, and some video editing software (Video Studio, Adobe After Effects, Motion, and Final Cut).
If you create a video following these instructions, I'd like to see it. Feel free to leave video responses.