via arstechnica.com/

In 2006, Rice experimented with a wiki for his Introduction to Political Science class. In addition to online articles, the wiki links to books at Project Gutenberg for older texts. This kept the students' reading list to below $40, an important consideration when tuition seems to go up every year. Students could also collaborate, posting class notes and helping to develop the course.

Collborative Wikis as an alternative to commercial academic TextBooks.