I also thought this video was interesting. With larger numbers I suppose the same principles apply in that we need to value diversity and look for ways of promoting the strengths of the students. I like the idea of the students providing some information about themselves so that they become more 'real' to one another. I wonder if you could devise an activity which gives the students an opportunity to learn something about each other as a starting point. It must be difficult with such a large group to promote individual identity.