This article presents the structure and theoretical foundations of the Learning Object Review Instrument
(LORI), an evaluation aid available through the E-Learning Research and Assessment Network at
http://www.elera.net. A primary goal of LORI is to balance assessment validity with efficiency of the
evaluation process. The instrument enables learning object users to create reviews consisting of ratings and comments on nine dimensions of quality: content quality, learning goal alignment, feedback and adaptation, motivation, presentation design, interaction usability, accessibility, reusability, and standards compliance. The article presents research and practices relevant to these dimensions and describes how each dimension can be interpreted to evaluate multimedia learning resources.