In elementary schools (grades: [Kindergarten] through 5th), classrooms can have a whole group of 18 to 30 students 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 may 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 than 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.