This manuscript was written to provide rehabilitation professionals, and vocational evaluation practitioners in particular, with information about learning style assessment instruments. The first section of the guide consists of a literature review that focuses on such aspects of development of the learning styles concept as individual differences, aptitude by treatment interactions, cognitive styles, learning styles, and learning disabilities. Discussed next are various problems and issues in the application of learning styles, including matching strategies, stability of learning styles, identifying one's own learning style, teaching and learning style congruence, and the lack of technology for matching all possible learning styles. Twelve selected learning style instruments are reviewed. The remaining three sections of the guide deal with the role of learning style in vocational rehabilitation, the benefits of learning style assessment, and the limitations of existing learning style assessment instruments. A list of references is provided. Appendixes to the guide include summaries of the 12 individual learning style instruments reviewed and purchasing information about each of the instruments. (MN)