20 years back there was a high school in my area that was scoring well above all other county schools on the state competency tests. They were blowing them out of the water to the point the county school board decided to redistrict the school by cutting 25% of the predominately white student neighborhoods, sending them to another school and bringing in 25% from predominantly minority neighborhoods.
The next state test scores fell right in line with the mediocre averages of all other county schools.
If they didn’t do that, the lawsuits would have bankrupted the area.
The two biggest worries of a school board is to fail to much below average, and succeed to much above average. Of the two, failures are preferable since it generates more money..
If you school district is to successful, it will be dismantled and sued.