Final answer:
Informal evaluations serve the purpose of comparing student development over time, determining the effectiveness of interventions, and conducting action research.
Step-by-step explanation:
The purpose of informal evaluations is to:
- Compare student development over a period of time: Informal evaluations allow educators to track the progress of students over time and identify patterns of growth.
- Determine the effectiveness of interventions: Informal evaluations help educators assess the impact of interventions on student learning and identify strategies that work.
- Conduct action research: Informal evaluations provide data for action research, allowing educators to investigate and improve their teaching practices.