On the flip side of this coin.

There is a girl that went to elementary school with my ds11 when he was in public school. We picked her up several times to go to math competitions with my ds. She is now in 6th at the middle school. The course descriptions are weird there—The other day I saw her and asked how school was going. They (the school) placed her in 8th grade math and her parents had no idea.

How do you have no idea? These are not poor people or disadvantaged in any way.

I am quite sure this was all due to tracking. MAPs and such..
Just food for thought.