2550 Harnish Drive, Algonquin, IL 60102
8am to 4:30pm Monday through Friday most of the year. During summer, winter, and spring breaks, the office will open and close one hour early (7am to 3:30pm).
Stay informed of the latest D300 back to school information this summer by visiting d300.org/BackToSchool.
8:00 AM - 3:00 PM
Teacher Institute (No student attendance)
Early Release Day