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.
precisely, no one taught me algebra, and it was vaguely mentioned in Middle school(because only above average graded kids(not gifted or exceptional) go to learn it. i partially learned it on my own, and funny enough i had to take math below algebra again, and it was just more annoying than learning algebra. just needed alot of pratice to be honest, the hs teachers expected you already know it by the time they mention the problems, outside from a portion of the students that already knew how to do the word problems most wernt taught. lets not get started with english(writing papers) that was different beast.