Dd is now happy in secondary school, but was always ahead in maths in primary. She was not learning anything in her maths lessons and eventually I took her out because the system was failing her.
If I could have changed anything, I would have had the school let her go at her own pace on computer lessons, such as Khan Academy.
Or I would have happily taught her at home and set work for her to get on with quietly in class.
In an ideal world, dd would have been taught separately by a teacher, but there is only so much budget and only so many teachers in the school. So, rightly, this support is reserved for those with special needs.
Differentiation did not work. Dd still had to sit through and listen to things she had mastered years ago before being given a worksheet with more difficult questions on the same topic, usually only once she had completed the easier sheet.
So this is a question for parents, of what would have helped your child, and for teachers, as to what you would like to see happen for those children who were say starting KS2, already having mastered a lot of KS3?