MO HB1139

Increases minimum school term requirement from 1,044 hours to 1,085 hours of actual pupil attendance for regular school districts and from 522 hours to 542.5 hours for kindergarten students

Changes school calendar requirements to open no earlier than seven days before Labor Day and close no later than the last day of May, with opening/closing date restrictions previously based on specific September dates removed

Requires students scoring less than proficient on statewide assessments to attend summer school immediately following the school term, with promotion conditioned upon attendance

Defines summer school term as starting no earlier than the second Monday in June, ending no later than July 31, with a mandatory break of at least four school days around July 4th

Increases makeup hours for inclement weather from six days to forty-two hours, with modifications to cap total required makeup at seventy hours instead of ten days