Stan , 1 year ago

I went back about 10 years ago to finish my undergrad and then do my masters.

For me the most help for refreshers, before I even bothered to register for classes, was to take calculus classes on coursera.

Khan academy is ok too, but coursera at that time anyway offered free video instructor led courses in calculus and had forum support where the prof and TAs would answer questions on homework and tests, which were also graded.

That’s a lot of content and service provided for free. Hope they still offer that.

Once I knew I could do that, I registered for classes at an actual brick and mortar uni where I did very well afterwards.