The district posted this announcement on their page Monday:
The District 308 web site experienced an outage yesterday evening (10/6/13) from approximately 6 p.m. until approximately 1 a.m. (10/7/13). We are sorry for any inconvenience this may have caused you.
Site service has been restored and we are putting in place measures to better monitor/eliminate future outages.
-District 308 Technology Services
According to the screenshot taken earlier the site was down since at least around 4 p.m., but it is now back up and working.