I should perhaps point out that everyone does some form of ICT, it's compulsory for all at KS4. The problem is that we can only have one group (all A band groups are timetabled at the same time and there's only me able to teach it, my degree is Computer Science and I already teach AS/A2 Computing, the other teachers are all business trained or non-specialists). Also because of the size of the rooms and the impact it would have on the other groups, my group has got to be of a pretty specific size (somewhere between about 18 and 25 students). Therefore, as much as I'd love to let everyone just chose what they want to do, practically, I can't. I can ask their opinions but I;m going to have to either force some people to take it who aren't keen or turn away some people who would like to do it. What I'm asking is, what's the best way to do that? Any suggestions for particular logic puzzles?