---
type: lesson
subject: {{SUBJECT}}
phase: {{PHASE_NUMBER}}
topic: {{TOPIC}}
status: learned
created: {{DATE}}
review:
  interval: 1
  ease: 2.5
  due: {{DATE + 1 DAY}}
tags: [{{subject-tag}}, {{topic-tags}}]
---

<!-- Before drafting: apply the teaching contract in [[learner-profile]] — analogy domains, density, layout, jargon pacing, tone. Delete this comment. -->

> [!abstract] In 3 sentences
> {{The absolute essence of this topic.}}

## 🧠 Core concepts

{{Explanation. Use short headings, tables for comparisons, and **bold** for terms on first definition.}}

```mermaid
{{Diagram if the concept benefits from one — validate syntax before embedding}}
```

> [!example] Worked example
> {{A concrete example walked through step by step.}}

> [!warning] Common pitfalls
> - {{Pitfall 1 — and why it happens}}
> - {{Pitfall 2}}

> [!tip] Pro tip
> {{Optional: a shortcut, mnemonic, or expert habit.}}

## 🔑 Key takeaways
- {{Takeaway 1}}
- {{Takeaway 2}}
- {{Takeaway 3}}

## ❓ Self-check — answer here in the note
> [!question] Q1 — {{Question that forces active recall}}
> **Your answer:** …

> [!question] Q2 — {{Question that applies the concept to a new situation}}
> **Your answer:** …

## 🔗 Related
- Previous: [[{{previous-note}}]]
- Plan: [[plan]]

## 🌐 Sources
<!-- Only when you verified time-sensitive facts with web search. One bullet per source. -->
<!-- - [{{Title}}]({{url}}) — accessed {{DATE}} -->