The teaching method I find best is a teacher explaining and writing with chalk on the blackboard, and the students taking handwritten notes on paper, asking whenever something is not clear. In other words, the most boring classical setup possible. Of course all the nuances and little details make all the difference: board picture, structure, teacher personality, pacing, choice of topic, interaction, motivation, excitement, etc.. It is not guaranteed to work, but as a format it is workable, and I found nothing so far that is better either as a student (long time ago) or as a prof at a top university (for some time now).
A distant second is the format we used during COVID: writing with a tablet using xournal, and streaming it via zoom (loosely like Khan academy). This is of course only my personal experience/opinion, but also informed by vast amounts of student feedback.
EDIT: I agree with the different perspectives from the responses, and should have qualified that I meant it for subjects one typically learns at a university, like calculus or linear algebra. One-on-one tutoring, self-learning can work even better or complement the above and skills, e.g. playing a musical instrument should be approached totally differently.
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