More than 10,000 instructional software packages have been published for elementary and secondary schools--thousands in each discipline. Unfortunately, not all sources of courseware evaluations are equally reliable; therefore, it is important to determine that evaluations include: (1) critical appraisal of content accuracy; (2) in-depth consideration of the appropriateness and effectiveness of the instructional strategies employed; and (3) input from testing with students. Some comprehensive and accessible sources of courseware evaluations are MicroSIFT Courseware Evaluations, which probably contain the most thorough and consistently reliable evaluations, and EPIE Micro-Courseware PRO/FILES, whose evaluations are synthesized from the reviews of two or more evaluators who have usually tested the courseware with students. Periodicals which contain software evaluations include the bimonthly "Electronic Learning," and the monthly "Educational Technology." Two sources that identify only high quality courseware (although according to different criteria) are "Only the Best, the Discriminating Software Guide for Preschool-Grade 12" (L. L. Mattas) and "The Yellow Book: A Parent's Guide to Educationally Sound Courseware" (NEA Educational Computer Service). (JB)