Sports scheduling for the Middle and High Schools is handled through ArbiterSports, where the calendars are maintained. These calendars have a nice web interface that allows you to sign up for email notifications. Each school is it's own separate site.
We plan on pulling each of these calendars into the School sites to allow for integration in our web app (although it's not live yet). Searching multiple calendars for items is easier on our website calendars. That will be on this second tab.