[Beatrix]

but how can anyone expect you to teach a group which consists of several different levels? If I were you, I'd split the group into @classes@ according to their level of knowledge and do with them separately. You can have at least two groups, and then you can give one group something to do while you are teaching the other one.
hey, maybe you can even make groups where those who are advanced levelk teach beginners
you can even tell them that one learns best when s/he has to teach and explain things to another person because he has to make things clear to himself first