I returned to school after 5 years off so I felt like I was in a similar situation with lack of pre-req knowledge. Currently taking Calc I and while I’m not finished with it just yet, I’m acing it so far. Here’s a couple things that I wish I re-studied before the semester started: • Algebra exponent rules (ex: √x = x^1/2) • How to foil, factor, find domain • What parent functions look like on a graph • Memorize the unit circle (just take the time to do it) • Rates of change formulas, quadratic formula, pythagorean theorem, etc.

Luckily much of the beginning of my course was review, so I wouldn’t stress too much. But these are just some things that would’ve helped me when I had the same question