Cramming produces recognition that fades within days. Spaced repetition uses the timing of review, not just the amount of it, to move information into durable long-term memory.
Physicist Richard Feynman built a learning method around a simple test: if you cannot explain something in plain language, you do not actually understand it yet. Here is how to use that test deliberately.
Working memory can hold only a handful of items at once. Cognitive load theory explains why complex work feels exhausting long before physical fatigue sets in — and how to structure work to fit within your actual mental capacity.
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