In considering the physical space of a classroom, the top priority must be safety. Carefully look around for loose cords, furniture in direct line of the emergency exit from the room, random loose items on the floor that could cause a student to trip. Desks and tables should be arranged so that all students are able to clearly see the board and hear. To best facilitate cooperative group work, desks should be arranged in groups. Most primary classrooms incorporate centers or stations, a reading nook, and space for students to meet with the teacher in small groups. A child-centered classroom has student work displayed around the room and provides for a print-rich environment.