Astronomy and physics education research and comments, field-tested think-pair-share (peer instruction) clicker questions, flashcard questions, in-class activities (lecture-tutorials), current events questions, backwards faded scaffolding laboratories, Hake gains, field-tested multiple-choice and essay exam questions, indices of discrimination, presentation slides, photos, ephemerae, astronomy in the marketplace, unrelated random sketches and minutiae.
20080107
Christopher Walken illusion
"The Christopher Walken Illusion" (animated *.gif) www.moillusions.com April 4, 2006
Color and position shifts give a convincing illlusion of Christopher Walken moving in front of a galaxy background.
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