A student suicide or parasuicide increases the risk that potentially suicidal teenagers see suicide as an enviable option. The "copycat effect" can be reduced by a postvention program. This proposed evaluative research project will provide an implementation and impact evaluation of a school's postvention program following a suicide or parasuicide. The implementation evaluation consists of a post-test of the experimental group only. The impact evaluation uses a pre-test/post-test quasi-experimental design with a nonequivalent control group. For the implementation evaluation, the independent variables for program characteristics are relative advantage, compatibility, complexity, triability, and observability. The independent variables for team characteristics are credibility, adaptability, availability, attention, affability, and usefulness. The dependent variable is the implementation level. For the impact evaluation, the independent variable is the program, and the dependent variables are knowledge, attitudes, and ability of the participants. All data will be collected by self-completed questionnaires and analyzed with the chi-square distribution. This project will contribute to the development of an effective implementation strategy of a postvention program and will provide the occasion to improve the postvention program in the high schools of the Saguenay-Lac-St-Jean region in Quebec, Canada. If the conclusions are positive, the Centre de Prevention du Suicide 02 will offer the opportunity to all high schools in the region to implement the postvention program. (LLL)