MERLOT is a free and open resource designed primarily for faculty and students of higher education. With a continually growing collection of online learning materials, assignments and reviews, MERLOT helps faculty enhance instruction. Links to online learning materials are collected here along with annotations such as peer reviews and assignments.The site contains over 4,000 links to online science and technology resources and over 600 links to online mathematics resources. The resources contain peer reviews that provide an overview, description of target population, technical requirements, and ratings for content quality, potential effectiveness as a teaching tool, and ease of use. This project is affiliated with NSF's NSDL (National Science Digital Library) effort.