Unfortunately parents don't know how to teach STEM topics, not in the US, especially given years of cultural slash on hard science and engineering. I don't have

Unfortunately parents don't know how to teach STEM topics, not in the US, especially given years of cultural slash on hard science and engineering. I don't have hard numbers, but I'll venture to guess that very few parents can explain how to use recursion to find the closed formula of a sequence, or the intuition behind vector space, or why 0.9999... is actually 1, or even as simple as modeling a problem as a linear equation system. And all these are really high school basics. I'm using math as an example, but the same idea applies to other subjects too, like not every parent knows how to write, let alone providing precise and accurate feedback to the writing of their kids. And from a parent point of view, why would I want my kids to waste his or her time in school learning very little, and then to spend my own time tutoring them? All I want is my teachers to do their job, and do it decently.