CAREO is a repository of over 3,500 educational materials on various subjects and interactivity levels as part of a larger project to create “a searchable, Web-based collection of multidisciplinary teaching materials for educators” for Alberta and elsewhere.

Established by the Maricopa Community Colleges in Arizona the Maricopa Learning Exchange provides users with access to over 500 materials on various subjects. Materials, submitted by users within the Maricopa community college network, ranges from teaching materials and pedagogical tips to links to sites containing educational content. The site has an RSS feed to allow communication of new records. Users are permitted to comment on resources.

Developed in 1997 by the California State University Center for Distributed Learning, MERLOT provides users with access to online learning materials through a collection of records that now totals over 8,000. Many materials described within the collection are peer reviewed by onsite staff and rated by users. Materials can also be collected by users into collections of recommended resources, or listed along with assignment or project concepts that use the listed resources.

Developed in 1999 by the University of Oxford’s Joint Information Systems Committee – Arts and Humanities Research Board, the Humbul Humanities Hub is a catalog of humanities resources online. The project hopes that its site will be the “first choice for accessing online humanities resources.”

MERLOT is a free and open resource designed primarily for faculty and students of higher education. Links to online learning materials are collected here along with annotations such as peer reviews and assignments.