My daughter is starting pre-k next year, what should she know when she starts?

I am wanting to work with her during the summer to make sure that she is ready. Her daycare has a curriculum but they don't monitor the children's progress. She is very articulate for her age and loves learning to draw and write. I am wondering what I should go over with her this summer. I am not going to badger her about it. I will probably only do activities with her for about 30 minutes a day. What do you guys think?