Great expression on the girl's face. The glasses are not at all distracting. I also like the hair - typical if the age group 4th or 5th grade?...I wish there was another angle without so much background, but then if you had to choose from the shots you took, I see why this was entered. Upon walking away, the background does not take away at all (I always walk away from a photo for a fresh look). In fact, it adds to the sense of "school" the sense of which is not really represented among the entries.
Looks like a B to me (I mean the note she's playing). I'm feeling like it being off kilter is a bit bothersome, but I can see what you're going for here.
I've been hanging around DPC long enough to realize that this kind of "snapshot" is not going to score very well here. You have to get really creative and do something different that is going to WOW the voter. This fits the challenge very well, but there is no WOW to it.
I like the look on the girl's face a whole bunch - but the cropping with the whole blank white board is unfortunate. Recropping in a square so that the girl in Blue is on the leftmost edge of the image would get rid of a bunch of 'wasted pixels'.