Subject Guides
Formal education is great when a credential is required (e.g. practicing medicine, law, etc.). But, I think it's often confused with learning itself. For most subjects, you could move much faster through independent study. And with the internet and LLMs at your disposal, the real problem is usually not access to knowledge, but understanding what you should study and in which order.
The guides collect materials I've personally worked through at various stages and found useful - not claiming expertise at all, just sharing reading paths based on my own experience. Note that wherever I haven't worked through materials myself and instead relied on input from mentors or friends, I have flagged it clearly. These were originally notes I put together for myself and tutees/friends, so they're intentionally quite concise. Some are older, migrated from my previous "Anshul Khazanchi Sinha - Reading Stack" page. I'm always happy to hear suggestions that could make these more helpful.