Not doing a very good job of teaching to tests are they?
Maybe there are too many tests. When I was in HS in NYC [a long time ago], the State Board gave 'Regents' tests which the teachers taught to and did a very good job. Tests were in English, History and Economics. Diplomas were with or without Regents credit. I believe this single test helped teachers, students, and schools.
Tests provide measure in health, sports or learning. Tests are for admission to professions. Knowing the 'score' is how the game is played.
It depends on the school, of course.
If "they" happen to be a school filled with well-off kids from two-parent families, they generally do great on the tests.
And if "they" happen to be a school filled with poor kids from a place near the street named for MLK, they'll almost always do poorly.
Testing can't deal with that kind of difference.