CITIDEL serves to “establish, operate, and maintain a part of the NSDL that will serve the computing education community in all its diversity and at all levels.” CITIDEL activities include community development, expanding through workshops knowledge and skills regarding the development and use of online educational content.

Funded by the NSF, iLumina provides access to nearly 1,500 materials useful for undergraduate teaching of Chemistry, Biology, Physics, Mathematics, and Computer Science.

LearningLanguages.net is a portal that brings together online foreign language resources for English-speaking K-12 students and teachers of French, Spanish and Japanese. The project was created and is maintained and enhanced by staff at the Internet Scout Project.

NEEDS is a digital library of resources for educators and learners within engineering. Records are drawn from various smaller collections. Cataloging records contain multiple searchable fields including type of learning resource and publication year. Metadata is based on IEEE LOM. The collection will soon be searchable by user education level and for the existence of peer reviews.

The SMETE Digital Library is a portal for the SMETE (Science, Mathematics, Engineering and Technology Education) Open Federation to a collection of materials of use to educators, learners, and policy makers. SMETE is currently developing a number of services for its collection including a personalized recommendations system “based on an analysis of both the usage patterns of a learning resource (measured as a function of the “reading time” of the resource) as well as the semantic similarity between resources.” SMETE is also developing a cataloging tool to produce metadata within an XML document using an HTML based interface. The project is also “developing a standard for user profiles so that participants in the SMETE Open Federation can share user profiles [when permission is granted] across libraries for purposes such as collaborative filtering systems, digital rights management and user comments and reviews.”

DLESE, funded by the NSF, provides educators and learners with access to thousands of resources that support Earth system science education. The collection includes resources such as lesson plans, maps, images, data sets, visualizations, assessment activities, curricula, online courses, and other materials. DLESE prioritizes community building, which is reflected in its Web page, containing sections on using online resources in education, news from the fields of earth science and science education and information on resources for professionals within the earth sciences. Resources are contributed by the science and education community individually or as thematic collections, and include both formally reviewed and unreviewed items.

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.