Questions to definately ask:
1. What is your nap time schedule? What do the school agers do during this time when they are home?
2. What is your weather policy as far as taking them outside?
3. what is your punishment policy for not listening, hitting, picking on each other, throwing things, etc... your child may not do this but believe me others do and you want to know how she plans to handle those instances. I had to pull my baby from a daycare because her own child (who was 2 1/2) had been throwing toys, hitting, and bitting...
4. Ask about food policy and what she expects.
5. Ask about taking off and calling out and does she have anything in writing with how much time she is closed.
6. Ask her what is the worst behavior she has ever encountered and how she dealt with it?
7. Ask her about how much early childhood background she has. What kind of workshops has she taken and look around her house to see how dedicated she is to the kids.