CampusPressFrom the site:
Since 2005, we've powered WordPress Multisite networks for educational institutions around the world. If you are looking to provide a stable, secure and hassle-free WordPress based learning network for your teachers and students, nobody has more experience to share.CampusPress is built upon the functions of WordPress, a website hosting service which makes websites easy, but is intended for use within educational institutions.
It is tailored specifically for K-12 and Higher Education so that everything from grade schools to colleges are able to create an all encompassing website for the entire institution, and it's sub colleges or domains.
For more information, see their site; CampusPress.com