The question "How ___ days a week does she go to school?" can be filled with various numbers depending on the context. Common answers might be "five" for a typical school week in many places, so it could read: "How **many** days a week does she go to school?"

If you’re looking for a specific answer, you might say:

- 5 days a week (for a standard schedule).
- 3 days a week (for part-time).
- 7 days a week (if she attends every day).

The answer would depend on the specific situation.