3blue1brown linear algebra + the linear algebra chapter from “all the math you missed but need to know for graduate school” - linear algebra and abstract vector spaces in general finally feel familiar.
Also, timbuktu manuscripts - showed a history that I had never really heard of. These are written manuscripts of african scholars which are hundreds of years old, and still exist today. Some record the history of great west african civilizations along with other things they studied (e.g. science, religion, math, literature, ect). I was never taught this history even existed but yet was made to learn the various details about asian, european, middle eastern, central/south american history. This, and the attempts to destroy/steal these manuscripts at various points in history, made it click how serious power of controlling information, and ultimately influencing beliefs can be, with respect to giving legitimacy to the various rulers/authorities. Beliefs/perceptions matter quite a lot. This 1hr lecture is quite good: https://m.youtube.com/watch?v=lQiqyyRfL2Y&t=16s
Jeffrey Chasnov's linear algebra courses when you want to get your hands dirty. I made my first matrix inversion code after watching his videos. His videos are not code, but instead just going through and explaining process without skipping any details such that you'd understand enough to code it. He does many linear algebra examples by hand on a writing board which ends up more engaging than the typical slideshow that tends to skip the "tedious" details.
On the Timbuktu manuscripts, I found this book really fascinating. I knew about bits of the story on a very rough sense but the details about various people, and excerpts from the manuscripts made for a book I had to finish.
https://www.simonandschuster.com/books/The-Bad-Ass-Librarian...
Syria’s Secret Library By Mike Thomson was suggested to me while I was reading the previous book, but I haven't made time to read it just yet.
Also, timbuktu manuscripts - showed a history that I had never really heard of. These are written manuscripts of african scholars which are hundreds of years old, and still exist today. Some record the history of great west african civilizations along with other things they studied (e.g. science, religion, math, literature, ect). I was never taught this history even existed but yet was made to learn the various details about asian, european, middle eastern, central/south american history. This, and the attempts to destroy/steal these manuscripts at various points in history, made it click how serious power of controlling information, and ultimately influencing beliefs can be, with respect to giving legitimacy to the various rulers/authorities. Beliefs/perceptions matter quite a lot. This 1hr lecture is quite good: https://m.youtube.com/watch?v=lQiqyyRfL2Y&t=16s
Behavioral biology class from Dr. Sapolsky (Sanford) - explains a lot of why we behave the way we do, from different biological perspectives https://m.youtube.com/playlist?list=PLqeYp3nxIYpF7dW7qK8OvLs...