Great scene! The exposure appears to be good and the subjects are engaging. Nice fairly nuetral color, which seems fitting to me. I think that this would be a killer image if it had a shallow DOF so as to blur the cluttered background and furthar isolate the subject. Also, a large reflector just left of or perhaps over the camera, might have helped fill the faces of the boys on the right and reduce the shadows.
would prefer more focus on their faces - especially the writer, nice image though and great oppurtunity for you to be able to capture it for this particular challenge - good job :)
I like this picture.. really, this shows me a normal school day of an other country (because I'm from austria). These boys look very cute in their uniforms ;)