Case-based Learning in Gastroenterology and Hepatology
http://www.vh.org/adult/provider/internalmedicine/GICases/Default.html

Investigative Case-based Learning
http://www.bioquest.org/case99.html

Case-Based Scenarios
http://eduserv.hscer.washington.edu/bioethics/topics/index.html

Group Problem Solving
http://peabody.vanderbilt.edu/projects/funded/jasper