Enhancing parents' ability to make informed choices is important to successful transition planning for youth with disabilities. This study used a multiple probe design across content areas replicated across participants to examine the effects of a computer-based instructional program on acquisition of parents' knowledge of the transition planning process (i.e., postsecondary goals, transition services, and postsecondary transition service providers). Results suggested a functional relation between computer-based instruction and parent knowledge of postsecondary goals, transition services, and postsecondary transition service providers. Suggestions for future research and implications for practice are discussed. (Contains 6 figures.)