IL HB4324

School boards may adopt an alternative calendar for a 4-day school week by resolution, subject to State Board of Education approval, and must apply it district-wide to all buildings.

Districts with a 4-day week must provide a minimum of 150 calendar days with at least 141 days of actual pupil attendance, with extended school days to meet minimum hour requirements.

Special education reimbursement rates are adjusted for 4-day week schools: students must receive minimum 75 minutes per day (or 375 minutes weekly) instruction instead of the standard 60 minutes per day (300 minutes weekly).

Average Daily Attendance calculations are modified for 4-day weeks to count sessions of at least 375 minutes as full days, with proportional adjustments for shorter sessions and adjusted minute thresholds for various student categories.

School calendars and any changes must be submitted to and approved by the regional superintendent of schools before taking effect.