I spent more time than I thought I would with this article on how to teach using a lightboard (similar to the way Khan Academy videos were produced). The light board allows the instructor to write notes and draw illustrations on a board the way they might normally, but without turning their back on their audience, as you have to do with a blackboard or smartboard. The lessons are presented using video. "You are filmed 'through' the glass. The clever aspect is that when processed, the video is mirror imaged. Although I am right-handed, in the video it appears I am writing with my left hand. The text can be read and appears to the viewer as normal.
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