How is her day structured? When my son's recess was an hour after he got to school, well, that didn't work out all that well for him behavior-wise. It took them a while for the light bulb moment and when they moved it to a more appropriate time, a lot of behavior issues for everyone were much improved.

The other thing that affects his behavior is cereal choices. I try not to let him eat red food dyed cereals for breakfast. I notice less behavior reports when I monitor sugar/dye in cereal.

The other suggestion is to ask pointed questions about when she's lost focus. Is it certain subjects? Certain times of the day? Maybe she gets a little less focused before lunch because she's hungry?

Good luck!