MO HB1016

School boards must prepare annual calendars specifying opening and closing dates with minimum 174 days (five-day week) or 142 days (four-day week) and 1,044 hours of actual pupil attendance, plus six make-up days for inclement weather.

Districts providing at least 1,078 hours of actual pupil attendance in the school year are not required to meet the minimum number of days specified in their filed calendar.

School opening dates cannot be earlier than ten calendar days prior to the first day in September without a public notice, public meeting, and majority board vote; school must end no later than May 31.

School days for five-day week schools are limited to seven hours maximum, except vocational schools in metropolitan districts or first class counties may have eight-hour days, and four-day week schools are exempt.

End-of-year state assessments cannot begin before May 1; districts violating calendar provisions face withholding of one-quarter state funding per violation date.