(1) Trustees may designate the preschool program as either a half-time or full-time program with a minimum of 720 hours. Outdoor play, snack, and meal time are included in the aggregate hours. Nap time and daily transportation to and from the classroom do not count as part of the 720 hour preschool program hours.

(2) The trustees of a school district shall set the number of days in the school term, the length of the school day, and the number of school days in a week.