In elementary schools (from Kindergarten through the 5th grade), classrooms can have a whole group of 18 to 30 students (in some cases these numbers may differ) and one, two, or even three teachers. When there are two teachers in a classroom, one is the lead teacher and the other one is the associate. Or the second teacher might be a special education teacher. There may be a third teacher in the back watching and taking notes. In lower elementary the classrooms are set up slightly different from upper elementary. In these classrooms there are tables instead of desks, a rug with a (Smart Board) for whole group learning, a library, computers, and centers. The rug is the focal point of the classroom and everything else is strategically placed around it. The teacher must be able to move swiftly through the classroom. To determine if the classroom is meeting the highest level of quality there is a grading scale called ECERS (Early Childhood Environment Rating Scale). There are 43 items on this checklist and it is divided into 7 categories and they are as follows: Space and Furnishings, Personal Care Routines, Language-Reasoning, Activities, Interactions, Program Structure, and Parents and Staff. In an upper elementary classroom students now use desks, there is no rug for whole group learning but there is a Smart Board and computers. Students also start practicing switching classes to get accustomed to middle and high, usually in fifth grade school transitions.