I'm giving a presentation about TBL to our STEM group in a few weeks. I'll likely use the presentation package that Jim Sibley put together (thanks!) but there is an obvious question that will likely come up that I don't know the answer to. What is the largest size class one can use TBL in, assuming you have a sufficient number of people in the classroom to help run it? Class sizes of ~350 are common here and one classroom seats up to 700. On "a sufficient number of people in the classroom to help," our STEM group has an active "Learning Assistant" program where undergrads assist with Peer Instruction and similar tasks. In some 500 student classes there are 30 learning assistants. The semester before they go into the classroom they go through a 1.5 hour course. It is modeled after the LA program at the University of Colorado at Boulder. On large class TBL I'm thinking that teams could report out with clickers. Perhaps the most important aspect is the ability for LAs and the instructor to be able talk to teams during class. Thus, every third row might be vacated to ease access. But, that's more a guess than something based on experience. Also, I'm thinking that in such a large class it might be difficult to get a sufficient number of students to explain their team's thinking. Thoughts? Experiences? - Bill -- Bill Goffe Senior Lecturer Department of Economics Penn State University 304 Kern Building University Park, PA 16802 814-867-3299 [log in to unmask] http://cook.rfe.org/