My educational research interests are many: here are a few talks and resources about some more recent work. Talk about limits to teaching . ... Talk about Webcast Worked Examples . ... Paper on mastery learning in 1st year physics . Paper on role-playing games in Astrophysics teaching . ... Problem Based Learning in Astrophysics paper Other areas of interest (currently unpublished) are many, including calibrated peer review, generic skills training, use of clickers and pre-commitment. ...