171.029. 1. The school board of any school district in the state,upon adoption of a resolution by the vote of a majority of all its membersto authorize such action, may establish a four-day school week or othercalendar consisting of less than one hundred seventy-four days in lieu of afive-day school week. Upon adoption of a four-day school week or othercalendar consisting of less than one hundred seventy-four days, the schoolshall file a calendar with the department of elementary and secondaryeducation in accordance with section 171.031. Such calendar shall include,but not be limited to, a minimum term of one hundred forty-two days and onethousand forty-four hours of actual pupil attendance.
2. If a school district that attends less than one hundredseventy-four days meets at least two fewer performance standards on twosuccessive annual performance reports than it met on its last annualperformance report received prior to implementing a calendar year of lessthan one hundred seventy-four days, it shall be required to revert to a onehundred seventy-four-day school year in the school year following thereport of the drop in the number of performance standards met. When thenumber of performance standards met reaches the earlier number, thedistrict may return to the four-day week or other calendar consisting ofless than one hundred seventy-four days in the next school year.
(L. 2009 S.B. 291)