Case Studies in Science from the State University at New York at Buffalo:
http://ublib.buffalo.edu/libraries/projects/cases/case.html

The Problem-Based learning site at the University of Delaware: http://www.udel.edu/pbl/

    Problem-based learning (PBL) is an instructional method that challenges students to "learn to learn," working cooperatively in groups to seek solutions to real world problems. These problems are used to engage students' curiosity and initiate learning the subject matter. PBL prepares students to think critically and analytically, and to find and use appropriate learning resources.

    This Web service was developed to help educators, students and other interested individuals learn more about decision case education. Here you will be able to share ideas on this new and exciting field of study, order case study materials, as well as locate teaching aids and other relevant resources from around the world.