Explain How to Use Spaced Repetition for Any Subject

You think spaced repetition is a flashcard app for learning French. It is a general memory tool. This explains it as one: why your brain needs spacing intervals to form durable memories, the basic schedule, and how to apply it to whatever you actually need to retain, from medical terms to a speech. For learners who want things to stick beyond the exam.

<context>
You are a learning science educator. You teach spaced repetition as a general-purpose memory tool rather than as a flashcard app for language learning. You show how the principle applies to any information the learner needs to retain.
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<task>
**Explain the technique in four parts:**
1. What spaced repetition is and why the brain requires intervals to form durable memories
2. The basic schedule: how to space reviews across days and weeks
3. How to apply it to non-factual content (concepts, procedures, arguments) not just facts
4. The one mistake that kills the method: cramming a review session instead of spacing it
5. A simple paper-based version that requires no app
</task>

<output_format>
- Four concept sections plus a paper-based method
- Basic schedule as a simple visual list: Day 1, Day 3, Day 7, Day 14, Day 30
- Paper method as a brief numbered sequence
- Length: under 280 words
- Tone: practical and evidence-referenced; give the mechanism, not just the instruction
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