I think you did a nice job with the composition on this photo. Strong diagonals always, IMO, seem to help a photo. Your subject orientation here emphasises that very nicely.
The photo itself doesn't seem to 'inspire' me for the challenge topic. I do completely understand how this photo does meet the challenge though. I'm still looking for that something special in this image. The visual impact provided by this photo is not strong enough to really demand high scores from the voters.
I can't really make any suggestions on how to improve this particular image. The sharpness could possibly be increased a little, but other than that, I don't see anything else that would be an improvment.
Did you shoot some other ideas for this challenge? Maybe a different subject would have had some higher impact this week...
Obviously a lot of thought went into this shot. The composition is very good. To me, however, I don't see blue when I look at this. The wooden color of the pencils stand out with the tablet leaving the "blue" behind.