[JackC]

I like the 3blue1brown youtube series for explaining mathematical problem solving, like this example explaining a difficult problem from the Putnam:

https://www.youtube.com/watch?v=OkmNXy7er84

"And those of you who follow the channel know that rather than just jumping straight to the solution, which in this case will be surprisingly short, when possible I prefer to take the time to walk through how you might stumble upon the solution yourself. That is, make the video more about the problem-solving process than the particular problem used to exemplify it."

I bailed out of math around calculus, and these videos helped me at least appreciate what I was missing.