[notenoughhorses]

I decided to start a CS undergrad degree 15 years after finishing my first undergrad degree.

The university had a math placement test. I didn’t remember almost at math, but spent about 3 weeks going through the placement test review materials for 30 min to an hour a day. Got almost perfect score on the placement test.

I did retake calculus 1 and 2 by my own choice since I wanted to know it quite well, and much of that seemed completely unfamiliar.

So it’s much much easier to learn a topic the second time around even if it’s forgotten. To get up to speed on it, you could use the placement test materials—collegeboard has some standard tests and materials to review for those tests, or your local university might have review materials for an in-house test.

I will say, I completed calc 2 a year ago now, and I already feel it slipping away again due to disuse. Now I’m onto new math topics I never took the first time around, like linear algebra and higher levels of calculus.