I really like the interface and options at wetpaint, one of the free wiki-hosting companies. Like most free services, they embed ads on pages that you create. Except now, if you create an education-based wiki with them, you can email them and they’ll remove the ads! Visit http://www.wetpaint.com/category/Education–Ad-Free for more details. They say:
Who qualifies for an ad-free wiki?
The following uses of education wikis qualify for ad-free status:
- Middle/High School, University, and Grad School Classrooms (ages 13+)
- Group projects and assignments given by a teacher as part of a class curriculum
- Dissertations, portfolios, and other displays of students’ work in school
- Wikis created by educators to connect with parents
But I’ve received two separate confirmations that they’ll likely consider library use as an educational use, so get out there, create your wetpaint wiki, and then email them to turn off the ads!