Some of the high school students where I work have shown interest in video feedback (affine transformations) and fractal geometry. I once saw a video where some people at Georgia Tech (Georgia Institute of Technology) were doing some experimentation with video feedback. I don't know what became of it. Anybody out there doing something with video feedback or has information about it? How about any activities in chaos theory or fractal geometry that would be appropriate for high school students? I would appreciate hearing from you.