The MERLOT collection consists of tens of thousands of discipline-specific learning materials, learning exercises, and Content Builder web pages, together with associated comments, and bookmark collections, all intended to enhance the teaching experience of using a learning material. All of these items have been contributed by the MERLOT member community, who have either authored the materials themselves, or who have discovered the materials, found them useful, and wished to share their enthusiasm for the materials with others in the teaching and learning community.

All the materials in MERLOT are reviewed for suitability for retention in the collection. Many undergo the more extensive “peer review” for which MERLOT is famous. MERLOT presents annual awards for various categories of materials added to or used in the collection. As described in Material Link Checking and Removal, all material URL’s in the collection are reviewed frequently for stainability.