Dear All As this is the first time we have been using TBL I plan to run an item analysis on the questions we are using. We have around 300 students in the group and I was considering basing this analysis on 10% of the group. I'd welcome feedback from others who have undertaken similar work. Thanks and best wishes Jenny Dr Jenny Morris Associate Professor (Senior Lecturer) in Health Studies Faculty of Health, Education and Society University of Plymouth Knowledge Spa Treliske Truro TR1 3HD Cornwall Tel: 01872 256461 Web: http://www.plymouth.ac.uk/faculties/health 'High quality education for high quality care'