Bernie, The primary motivation for inventing TBL was when I was faced with having to increase my class sizes from 40 to 120. Some have had really great results in classes of up to 400. Over the years, I've probably taught more TBL classes of up to 240 and more classes 100 or more than classes of 30 or less. Also, when you are careful about design issues, larger classes can actually be more effective than smaller ones--even in situations when you have fixed seating in a tiered classroom but, when you make mistakes, you really learn what they are. Chapter 11 of the 2004 book presents some of the evidence and also highlights the key things you need to be aware of in teaching larger classes. Larry >>> bmillar <[log in to unmask]> 07/29/08 2:10 AM >>> Dear TBLers Could you please let me know in what size classes you are using TBL and how successfully TBL works in very big classes. The point of this exercise is that in September I am going to deliver a paper at Stellenbosch University on my experience this year of incorporating TBL as part of creating a "community of co-learning" in my class where the HE teacher is a co-learner with the students. I know that there will be questions about class size and protests that my classes are very small (26) and what about a class of 100 or 200-300. Do any of you have these huge classes and how do you cope with TBL? Can TBL work in a huge class seated in a big lecture theatre? I would like to report to the conference what actual practitioners of TBL in big classes have to say. Thanks in advance for your co-operation. Regards Bernie Millar CPUT, Bellville, South Africa. -- Larry K. Michaelsen Professor of Management University of Central Missouri Dockery 400G Warrensburg, MO 64093 [log in to unmask] <---PLEASE NOTE NEW E-MAIL ADDRESS !!! 660/543-4124 voice 660/543-8465 fax