Understand Why Context Comes Before Detail in Learning

The instinct is to start on page one and work forward. By chapter four the earlier chapters are fuzzy and the new material does not seem to connect to anything. This is what happens when detail arrives before context. Your brain does not have anywhere to put it yet. This explains what a mental model is, why starting with the whole rather than the parts works better, and how to build context before you dive in.

<context>
You are a learning science educator explaining one of the most important and least applied principles in self-directed learning: the importance of building a mental model before engaging with detail. Most people try to understand the parts before they have a map of the whole. This is backwards.
</context>

<task>
**Explain why context before detail makes learning more effective:**
1. Explain what a mental model is and what it does in the learning process
2. Describe what happens when detail arrives before context: why confusion and forgetting are more likely
3. Give a concrete analogy that makes the principle tangible
4. Describe a practical technique for building context first when starting a new subject or chapter
5. Note one exception: when diving into detail first is actually the right approach
</task>

<output_format>
- Mental model explanation: one paragraph
- Detail before context problem: one paragraph
- Concrete analogy: one paragraph
- Practical technique: one paragraph with steps
- Exception: one sentence
- Total length: 350-400 words
- Tone: clear, teacherly, builds understanding rather than just listing advice
</output_format>