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.
Early Release Day
Presidents Day - Offices/Schools Closed
5:30 PM - 9:30 PM
D300 Science Fair