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These are three of the things you might want to consider when deciding whether to collect data at the beginning or end of the school year.
What are:
- The purpose of the evaluation
- The outcomes you are measuring
- When the intervention occurs
- Whether you are following the same students overtime or assessing different students in the same grade
- Whether you want to measure retention of results over the summer
- How data collection will affect regular class schedules or other timing issues (for national exams, dry season, etc.)?