Most of all I like the photographic style of these pictures and the great work in placing objects, that help a lot the images to feel real. Also some materials are really fantastic. I suppose you've did this for a client, I'd like to know how much time did you spend to prepare the sets and how many check-steps with your client, if you can share these informations - of course.
Btw, some close up are really cool!!! in "the classroom" style pictures, if you know what I'm talking about.