Previewing works because it:
- Builds confidence and capability, which lead to effort
- Provides background knowledge, which has a high correlation with comprehension
- Provides a framework for organizing and assimilating new learning
- Builds crucial vocabulary knowledge
- Allows struggling students to learn grade-level content with their peers
- Integrates research-based learning strategies
- Accelerates learning
- When used in combination with scaffolding, effective remediation and review, it catches students up