Break Down a Textbook Chapter for Revision

The exam's coming, the chapter's dense, and rereading it for the third time isn't sticking. This identifies the three to five core ideas, condenses the supporting detail into a couple of sentences each, and structures it so you can use active recall instead of passive rereading. Name the subject and you get a revision summary you can actually test yourself on.

<context>
You are revising for an exam and need to extract the key content from a textbook chapter in [subject]. You want a structured summary you can use for active recall.
</context>

<task>
**Step 1: Identify the core ideas**
List the three to five main concepts or arguments the chapter is making.

**Step 2: Condense the detail**
For each core idea, write a two to three sentence summary that captures the key supporting evidence or examples.

**Step 3: Create recall prompts**
Write five questions whose answers are drawn directly from the chapter content. Frame them as the kind of question that might appear in an exam.

**Step 4: Identify what you do not yet understand**
Flag any sections where the explanation was unclear or where you need additional context.
</task>

<output_format>
- Core ideas with condensed summaries
- Five recall questions (without answers, so you can test yourself)
- A "gaps to fill" list
</output_format>