I don't think just plopping all the subject material in front of a student and expecting everyone to immediately "get it". Some people may have the intuition to read a group of definitions or a proof and suddenly understand the higher level concepts gluing everything together, but that certainly doesn't work for everyone.
Anecdotally, having a textbook that explains a concept via examples without jargon and informative pictures, then throwing all the definitions and proofs at me has been much more helpful to my understanding in multiple subject areas.
I'd also throw "extremely wordy passages" in there as well because having something repeated & reframed multiple times has help me understand something from multiple perspectives - and remind me of a previous definition at a crucial point in the text.
Anecdotally, having a textbook that explains a concept via examples without jargon and informative pictures, then throwing all the definitions and proofs at me has been much more helpful to my understanding in multiple subject areas.
I'd also throw "extremely wordy passages" in there as well because having something repeated & reframed multiple times has help me understand something from multiple perspectives - and remind me of a previous definition at a crucial point in the text.