Check out these additional resources:
IDEA: Provides briefs and papers on using different active learning techniques and the research to back it up. According to our friends at Harvard Initiative for Learning and Teaching, this is "the single best resource for practitioners interested in educational research."
PER User's Guide: Podcasts on using active learning in the sciences and physics education, in particular. Includes contributions from Eric Mazur and others.
Vanderbilt Center for Teaching: Extensive bibliography of "clickers" research. Covers the use of clickers in a wide range of disciplines.
SEI Videos: Short videos on using clickers in a wide range of settings. Put together by Noble Prize-willing physicist Carl Wieman as part of the Carl Wieman Science Education Initiative at the University of British Columbia.