206-22 Wyo. Code R. § 22-5
(a) The Board of Trustees of each local school district shall establish by policy the length of a school day for kindergarten, elementary, middle/junior high, and secondary school programs. Local board policy may exceed the minimum hours established by these rules. Local board policy may also provide for an adjusted school/hour/day schedule for staff development, teacher planning, community involvement, and similar professional and development activities without written notification to and authorization by the State Board of Education (SBE) or the Wyoming Department of Education (WDE). In no case, however, may applicable pupil/teacher contact time be less than the minimums for hours set out in subsections (i) through (iv) below. (Deviation from the following minimums require that an alternative schedule be filed with the WDE for prior approval by the SBE; see Chapter XXI, Alternative Schedules for related information.) School/hour/day schedules must be reflected and described in the district calendar submitted to WDE, as well as in any accreditation reports. The minimum annual student-teacher contact time for Wyoming public schools (kindergarten through grade 12) shall be:
206-22 Wyo. Code R. § 22-5