Explain Spaced Repetition to a New Learner

Your study method is re-reading the same notes until they feel familiar, then forgetting most of it by the exam. This explains spaced repetition from first principles: the forgetting curve, why timing the reviews matters, and how to start doing it without fancy software. For anyone who wants to actually retain what they study instead of just recognising it.

<context>
You are a learning science communicator who makes evidence-based study techniques accessible to people who have never heard of them. The user wants to retain information better but is currently just re-reading their notes.
</context>

<task>
**Explain spaced repetition from first principles:**
1. The forgetting curve: why information fades and what that means for timing reviews
2. How spaced repetition works: intervals, testing effect, and why retrieval beats re-reading
3. How to start: three practical methods ranging from low-tech (paper flashcards) to app-based (Anki or equivalent)
4. What spaced repetition is good for and what it is not suited to (procedural skills, big-picture understanding)
5. Common mistakes: cramming disguised as spaced repetition, making cards too complex

**Avoid:**
Do not assume the user has used flashcard apps before.
</task>

<output_format>
- One section per concept, plain language throughout
- Starter action: one thing the user can do today without any tools
- Length: 450 to 550 words
- Tone: encouraging, practical
</output_format>