Summaries are presented of papers from a symposium entitled "The Evaluation of Complex Programs Using Participatory Evaluation" that focused on a comprehensive school service program in a south Texas alternative high school. "Theoretical Framework and Objectives" explores the problems of evaluating such programs. Problems result from the complexity and flexibility of the programs, difficulties in evaluating collaboration, and the interdisciplinary nature of the endeavors. "New Research and Evaluation Designs for Comprehensive Service Models" by Jane Stallings provides an overview of the conceptualization of a research and evaluation agenda for complex models in general, and comprehensive service models in particular. "Increasing the Academic and Social Success of Children, Youth, and Families: The Options in Education Programs for High Risk Students" by Tabitha Gutierrez and Larry Kohler describes the Options in Education program created as an alternative for students at risk of school failure and dropout. The program offers comprehensive services to about 200 students from the primarily Hispanic American population of students in the district. "Implementing a Model for Participatory Evaluation: Findings from Three Studies" by Stephanie L. Knight and Karen Duhon describes the use of participatory research and evaluation to assess the Options in Education Program. "Evaluation of Complex Programs Using Participatory Evaluation" by Jane A. Stallings provides further information on the Options program and its evaluation. (Contains 16 references.) (SLD)