Slight nit-picky thing here...the reason I can tell this posed. She is holding a pencil and her paper is buried under books. I would like to see her really studing, not showing us how she studys. Also, along the posed line...I have never seen anyone smile while they are studying late at night. Just an observation.
I understand that the light is coming from the lamp, but it casts a very heavy shadow to the left and is also very yellow. You could probably easily correct for this by setting the appropriate white balance or even just adjusting the picture in lightroom or photoshop...4