A few colleagues and I recently wrote about our integration in a medical school curriculum (source). Well - here is a librarian at the University of Buffalo who facilitates a small group as part of a clinically-focused, cased-based dental course. An intriguing role for librarians, and one that would rely greatly on the strength of the relationship between the school & library. I can't imagine doing something like this, so kudos to the instructor.
Hasman L. Librarian-facilitated problem-based learning course in a school of dental medicine. Med Ref Serv Q. 2012 Jul 31(3). PMID: 22853307