Rule of thirds. The clock is the main focus and is on the side.and not in the middle.
Repetition. The repitition is being used in the tables and chairs and the rows there in.
Angle. Is he picture was taken by angle way.
Filling the frame. The whole picture is filled with the art of the photo
Framing . The guy is right in the middle of the picture taken every space of the frame.
Leading lines. The locker and the posters are in the rows (lines) of the lockers.
Selective focus. The "40 LC" the main focus.
Errors :
Mergers. You can't see the other person that's pointing,
Cropping of body parts.