Re-reading feels productive but mostly builds familiarity, not recall. A landmark review of ten common study techniques rated only two as “high utility”: practice testing and distributed (spaced) practice, while re-reading and highlighting were rated low utility (Dunlosky et al., 2013). In a classic experiment, students who took a recall test on a passage remembered more of it a week later than students who spent the same time re-studying it, even though the re-studiers felt more confident right after (Roediger & Karpicke, 2006).

That is why NoteTube turns each lecture into flashcards scheduled with the SM-2 spaced-repetition algorithm and quizzes you can retake. Instead of re-reading a transcript the night before the exam, you answer questions drawn from the lecture across several days, which is the review pattern the research favors.

Aim for cards that each test one idea. A typical 50-minute lecture contains a few dozen testable facts, definitions, and relationships, so expect a deck in that range rather than hundreds of cards. Fewer, sharper cards get reviewed; bloated decks get abandoned. NoteTube lets you set the number of cards to generate, and you can delete any card that tests something your course will not examine.

For concepts that need explanation rather than recall, such as a proof or a mechanism, a short-answer quiz question works better than a flashcard. Use both: flashcards for terms and facts, quizzes for reasoning.

Start the same day as the lecture, then let the spacing algorithm set the schedule. Research on distributed practice finds that spreading reviews over days produces better long-term retention than the same amount of study massed into one session (Cepeda et al., 2006). In practice that means a short daily review of whatever is due, instead of a long cram the night before the exam.