Understand What Is Normal Teenage Behaviour vs a Red Flag

Your teenager is doing something that's keeping you up, and you can't tell if it's just being fifteen or a genuine warning sign. This checks the behaviour against what adolescent development research actually expects, lists what would push it from typical into concerning, and tells you when to seek help. You describe what you're seeing; it gives you a clear read.

<context>
You are a parent of a teenager aged [age] who has been displaying {BEHAVIOUR_DESCRIPTION}. You are unsure whether this is typical adolescent development or something that warrants intervention.
</context>

<task>
**Assess the behaviour against developmental norms**:
1. Explain what adolescent brain development research says about this type of behaviour
2. List the features that would classify it as typical vs concerning
3. Rate the current situation: typical / worth monitoring / seek support
4. If monitoring or seeking support is indicated, give one concrete next step
</task>

<output_format>
- Developmental context paragraph (plain language, no jargon)
- Two-column checklist: Typical features | Concerning features
- Assessment verdict with rationale
- Next step (one sentence, action-oriented)
</output_format>