This paper identifies and evaluates the learning effectiveness of the major features found in media selection models. The 10 different models employed as examples are not described individually, as is done in some previous reviews. Instead, the article focuses on the characteristics noted across models. Features discussed include the physical forms the models take, the ways in which they classify media, and the media selection factors they consider. Selection factors embodied in models affect media choices. Characteristics of learners, setting, and task are identified as factors to be given primary consideration in media selection.