Earlier quoted context omitted.
You can get remote tutors to teach your kid skills, yes. However, if your goal is to have your kid advance to higher math classes, it isn't enough to just know the skills. Schools erect extreme barriers to advancement (Palo Alto USD has been successfully sued on this point [1]), so what students really need is to enroll in outside courses that are certified replacements in order to get credit. Finding out about which…
The article you linked is incredibly confusing. I assume the issue is, which is typical of any advanced courses in school districts where helicopter tiger moms live, that little billy didn't qualify for the advanced math course because he's not smart enough but mom knows he's actually a genius. The pressure to let in little billy builds and builds until the districts relent and fill the classes with buffoons and the…
The crux is that many students would take the 9th grade math course via private courses to then jump ahead a year or two when they get to the high school. The school tried to prevent people from doing this and the parents sued.
I went to this high school ~10 years ago and at the time a handful of kids every year would do this. I'd imagine it's much higher now though.