What does the doctor say? What does the school say? Most schools put information in the school handbook on when it is advised to keep a child home.
Also what do you think? Do you think she is well enough to go to school. I can tell when my kids are feeling better, because they start bouncing off the walls if I try to keep them resting. Is she eating normally? Does she seem like she is better? I wouldn't go so much by the temp, but how she seems to feel.
I remember having strep and going back to my normal routine too soon, and then wishing I had not, because I felt so horrible. She could suffer a relapse. I don't think it would hurt to keep her home an extra day or two.