Please consider that the mandated standardized tests and "lesson plans" are designed by political appointees who may have PhD in Education but have never actually taught in a classroom and have no realistic concept of what the public education system is like.
Also consider that ALL students must take these tests. That includes non-English speakers, children with severe behavioral problems, and Special Education students. No-one is exempt.
Standardized testing is designed to fail. Some schools have tried to raise their scores by expelling as many problem students as possible. The problem usually isn't with the teachers themselves, but with school administrators and the soulless suits at the Department of Education. But the teachers get all the blame.