How about this one? Pai, A. et al. 2010. The Effectiveness of a Case Study-Based First-Year Biology Class at a Black Women's College. Journal of College Science Teaching. 40(2):32-39. (Sorry, can't figure out how to do italics here.) Also, I am using TBL at an HBCU. No signs of depression. Dianne York Biology Department Lincoln University [log in to unmask]