This article is one that relates case based teaching specifically to the pharmacy curriculum. The article and methods it describes were performed in a pharmacy school in Portugal, but I believe the principles can be applied universally.
This website is a great resource. They provide a ton of links to great articles detailing different aspects of teaching with case studies specific to a science curriculum. The provided bibliography provides some additional examples, as well.
This website from Carnegie Mellon provides a brief summary on case studies and how they can be most effectively used in the classroom setting. I really liked it because I found it to be very succinct and a good starting point for this topic. This website also has a few other links on the left that could be useful for other aspects of preparing to teach a class.