My daughter is in Year 7. In some classes she has already been placed in a set based on what the tutors have seen/results of SATS and school testing which all makes sense.
However, she has 3 projects she is working on with other girls (life skills, music and IT) and understands it will be decided which set they are put in based on the mark given for the project. They have been able to choose who they work with. Is this something that generally happens? I can't see they will be put into the correct set based on their own personal ability if it's based on something they've done which someone else. Luckily, one of the projects she is working with someone who is in the same English and Maths sets, but the other two (although lovely girls) have always achieved below my daughter in all subjects and in all their academic work in the new school are in lower sets.