Book of Proof: https://www.people.vcu.edu/~rhammack/BookOfProof/ Art of Problem Solving for if you need/want to rebuild your pre-college foundations: https://artofproblemsolving.com/store Cal Newport has great tips on studying efficiently/effectively (and you can implement some of his strategies with Anki): https://calnewport.com/case-study-how-i-got-the-highest-grad...
huh interesting links. I do appreciate the "rebuild the pre-college foundations" part too, IMO I think that's important.
I kinda undersold it, too.
They go much deeper than what you learn in high school. You'll build a foundation strong enough to flourish in any undergraduate math program in the country, including those in the Ivies.
More than enough for a CS program or a working SWE.