The real problem in the government schools is that for the most part the teachers are not competent in their craft.
They may understand the subject, but they do not have a clue how to teach others.
Teaching colleges teach only “craft”, not subject. “Theory of Education”, “The LGBT Parent”, “Nutritional Poverty and Learning”. OK, I made a couple of those up. But, we know that kind of garbage is going on. There are very few physics, chemistry, or mathematics major teachers, only “teaching” major teachers.
Teaching emphasis the last 30 years is politically correct “inclusion”, not on being able to explain Maxwells equations to your grandmother.