All D91 schools start an hour later than normal on Fridays so teachers can work in Professional Learning Communities and focus on student achievement. Late Start Friday is part of the district's ongoing efforts to try and ensure all students are successful. In the Professional Learning Communities or PLCs, teachers dig into student data, look at potential gaps in student learning, and discuss ways to address those gaps by changing instruction or offering interventions. Questions about your school start time? Review the School Calendar.