I'm on maths supply and just started at a new school on Friday. I took the year 9s on Friday and have them again on Tuesday. The ability range appears to be wide. They have had a succession of different supply teachers (non-specialist) or cover supervisors for the past 3 weeks and a pile of unmarked worksheets. When I gave them the set work on Friday (first time I had seen them), some of them are streets ahead of others. I have the class all this week. I asked them to bring in all their worksheets etc for Tuesday while I figure out the best approach. I have two ideas: (1) find suitable extension activities for the very ahead students (about a quarter of the class) and try and give some extra help to the ones who are behind - mainly but not entirely the more disruptive students - or (2) to arrange them in small groups of 3 or 4 with one of the 'very ahead' per group to 'teach' the behinds how to do the problems and try to work my way around the class gradually marking (without grading) their sheets and identifying their weaker areas for their regular teacher when he gets out of hospital! I think I have them for 3 periods (about 2 hours) this week. Not sure how this will go down with the students though and whether I'm risking chaos? Any views as to which would be the best approach or is there one I haven't thought of? This is the first maths supply I have done for quite a while so would appreciate feedback.