In Phase I of this SBIR project, 3C Institute (3C) developed a working prototype of an innovative computer-based coping skills educational program for adolescent substance abuse treatment completers. For Phase I, 3C developed and tested two customizable intelligent educational modules to teach coping skills in order to help adolescents avoid relapse, along with a brief instructional game for each segment. The Phase I prototype also included an online Parent Guide to inform parents about the uses and benefits of the product. Phase I R&D provided strong support for the quality and value of the prototype as well as the viability of the proposed educational package and its promise for preventing substance abuse relapse with adolescents. Phase I results supported excellent quality of the product through high ratings of quality, appeal, and value. High feasibility and usability was also demonstrated through high ratings for ease of use, usability, and potential effectiveness.