ARM 10.55.712. CLASS SIZE: ELEMENTARY

(1) In single grade rooms, the maximum class size shall be: (a) no more than 20 students in kindergarten and grades 1 and 2; (b) no more than 28 students in grades 3 and 4; (c) no more than 30 students in grades 5 through 8. (2) In multigrade classrooms, the maximum class size shall be: (a) no more than 20 students in grades K, 1, 2, and 3; (b) no more than 24 students in grades 4, 5, and 6; (c) no more than 26 students in grades 7 and 8. (3) Multigrade classrooms that cross grade level boundaries (e.g., 3-4, 6-7) shall use the maximum of the lower grade. (4) In one-teacher schools, the maximum class size shall be 18 students. (5) Instructional aides are mandatory when class size or teacher load exceed the standards. An instructional aide shall be assigned a minimum of 1 1/2 hours per day, per student overload up to six hours. (6) An overload of five students per classroom is considered excessive.