I decided to learn math a few weeks ago and found this recent post about Math Academy:

https://news.ycombinator.com/item?id=41534847

The site is great and clearly had a lot of thought put into it, and the founder posts here and on his blog about their design decisions. The things I've enjoyed most are:

1. It's paid, and fairly expensive. I'm the kind of person who can self-learn, but I can't follow a free course to save my life. I don't mind the cost as it incentivizes learning at a good pace and because of

2. The quality. It's excellent, and every lesson builds on the previous one in a knowledge graph. The most important for me might be

3. There's no videos, just text explanations and diagrams. I know some people prefer the Khan-academy style with a lot of videos, but I prefer just reading and jumping in.

Since I have a lot of free time right now and would like to brush up on my education, mostly in development, I'm wondering if there have been any recent courses that roughly follow this format. The only thing I can think of is the Execute Program by Gary Bernhardt. I remember enjoying working with it but it was fairly sparse on content if I recall correctly.

I'm eyeing "High Performance SQLite" but while the content looks great, it's sort of the opposite: all video and no work to submit:

https://highperformancesqlite.com/