Measurement and Unit Conversion

Help me with measurement and conversions:

Topic: ${{TOPIC}}
Level: ${{LEVEL}}
Systems: ${{SYSTEMS}} (metric, imperial, scientific)
Specific Challenges: ${{CHALLENGES}}

Cover:
1. Metric system basics
2. Imperial system basics
3. Conversion factors
4. Dimensional analysis method
5. Converting within systems
6. Converting between systems
7. Scientific notation
8. Significant figures
9. Precision and accuracy
10. Common conversion errors
11. Practice problems
12. Real-world applications
13. Quick reference table
14. Estimation techniques