That seems like an excellent arrangement. Yet to have such a course in colleges and universities as College Algebra And Trigonometry; or the thing called Pre-Calculus, is still very important, too. Not everyone had "Pre-Calculus" in high school, and even those that supposedly did, could still choose a path into it at college. I myself still trust actual coursework instead of relying on a placement or qualification formal test. If someone having had PreCalculus were to do that ALEKS, show low results, and then review Pre-Calculus on his own, he could just as well do the whole Pre-Calculus course as enrolled student, but this is his to decide about.https://www.aleks.com/highered/math...e6_pcalculus#ghighedmathcollegiate6_pcalculus
ALEKS (see link) pre-calc is just an online system for assessing and building math skills up to and including pre-calc. Unlike human teachers these days, who often gift grades, so that a grade in high school math courses is no assurance of preparedness, ALEKS pre-calc provides a rigorous assessment of abilities. Completing 90% of the pie in any given subject indicates pretty good mastery. 90% of the pie in pre-calc indicates that the necessary material is honestly mastered even if one has been gifted grades along the way.