In Oklahoma, the requirement usually is up to “algebra 2” - this is mostly domain and range, finding roots of polynomials, and logarithms.
IMHO, the world would be better if calculus was a required part of the high school curriculum. Like yeah, most people aren’t going to need the product rule in day to day life, but the fundamental ideas about rates of change seem like they’re something that everyone human deserves to be exposed to.
I think he doesn’t need math tutoring. He needs someone to sit with him while he does his homework, and he needs encouragement. Our education system just marches people through to graduation without giving them the chance to breathe.
But I agree, our teachers have been struggling for decades.