Is there a school psych? You could ask if she/he can do an observation to see what percentage of time she is on task. I'm not sure what is normal for a 5 year old (kindergarten?). I was told that for first grade they should be on-task 80 percent of the time. There are also inventories for ADHD (like Conners) that you can fill out as well as teacher versions. They can't diagnose ADHD but you can take the results to her doctor.
Ask the teacher if there are significant focus issues compared to the other kids. If the answer is "yes"...she probably has ADHD in my opinion. They probably won't come right out and tell you if they think she has ADHD or not. They will talk about "focus issues" and hope you figure it out.
