US Hawks Hang Gliding Association

If anyone enjoys excellence in math videos, I highly recommend this web site:

https://www.3blue1brown.com/

It's put together by Grant Sanderson, and his explanations and graphics are the best I've ever seen. Here's a fun one to start with:

https://m.youtube.com/watch?v=AmgkSdhK4K8

Cryptocurrency is pretty hot in the news right now. Here's Grant Sanderson's explanation of that topic. As usual, his explanations are both clear and insightful.

https://www.3blue1brown.com/lessons/bitcoin
https://youtu.be/bBC-nXj3Ng4

Also, for anyone interested, these are tutorial and simulation links:
   https://www.bitcoinsimulator.tk/explanation?page=1
   https://www.bitcoinsimulator.tk/blockchain?chain=public

I first learned of Grant Sanderson's work when I was trying to understand Quaternions at my job. That led me to his excellent videos:

https://www.youtube.com/watch?v=d4EgbgTm0Bg


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


Here's an interview with Grant:

https://www.youtube.com/watch?v=Qe6o9j4IjTo

Here's another brilliant video by Grant Sanderson:

https://www.youtube.com/watch?v=piJkuavhV50