The Health Network for Evaluation and Training Systems (HNETS) at the University of Houston provides research, evaluation, training and technical assistance to assist schools, communities and healthcare settings to meet their health goals. HNETS is based on transdisciplinary systems theories and concepts for the development, implementation, maintenance and assessment of health programs and policies. Stage-based models are used to help programs facilitate change at the community, organization, work group and individual levels. Emerging computer-based technologies are used to support these efforts.