The reflective material of the floors and windows are created simply by using grey marker. I also like the contrast between the grey tones of the floor, walls and ceiling and the vibrant colours of the windows and benches.
get students to draw planes of the face over magazine images yr I need to do this. This'll be so helpful for when it comes to structuring out a face, just so you get used to it. I'd def try it with all sorts of face types, too.