My kid was accelerated in math and doing fine right up to pre-calc honors her freshman year. When I had a discussion with the teacher about some seeming gaps in her knowledge between A2 the previous year and the class she was in, he told me the other 5 freshmen in the class were all fine. It was only my daughter struggling.
It is my understanding the district is no longer allowing any acceleration beyond A1 in 8th grade. They say it is incompatible with the new curriculum.