I have 10 in my GCSE class. I am going to do 2 plays for unit 3, 5 in each. I am interested in some advice regarding casting the plays (I'm not going down the devising route). Should I put my top 5 in one group an the rest in another group, or mix them up? I know the benefits of both, but I'm tempted to have one excellent play and one average play. Thoughts?