I’m getting older and I’m forgetting things. I didn’t keep all my school resources from when I was a kid, but I’d like to re-discover math.
What are some good (free) resources for basic to advanced math?
There’s a whole bunch on YouTube.
bprp (= black pen, red pen. He has multiple channels of varying difficulty), Prime Newtons, Sybermath / a+bi, Andy Math and Michael Penn to name five. One or more of their respective styles or their level might not be right for you, but watch a few anyway and you might get recommendations for other channels that you like better.
If you like popular or recreational mathematics, Numberphile is a long-running channel with hundreds of videos, and relative newcomer Wrath of Math is doing numbers (in more than one sense) at the moment.
Streetfighting mathematics by Sanjoy Mahajan.
mathacademy.com is often mentioned as good but it is not free
3blue1brown, veritasium, welsh Labs
