

For math, I think 3blue1brown does an incredible job. Here is his take on the essence of calculus. If you prefer textbooks, there are many open-source options. MIT is a good source of open lectures, texts, and problem sets.
For general expert suggestions about a variety of subjects, I like five books, for example here are some suggested books on linguistics, religious studies, international relations, and art theory.




Glenn Gould? When he’s holding forth, he seems like a Nixon impersonator doing college radio.