"Promoting healthy behaviors is multi-faceted and no health is possible without mental health. The ultimate outcome of unhealthy and risk-taking behaviors is suicide. Risk-taking and suicidal behavior can be prevented. A pilot intervention study will be implemented to assess the effects of three different health promoting / suicide prevention programs in 11000 students across 11 European countries: 1. TeenScreen - screening by professionals of at-risk students through a questionnaire. 2. QPR (Question, Persuade & Refer) – a gatekeepers’ program, training all adult staff at schools (teachers, counselors, nurses etc.) and parents on how to recognize & refer a student at-risk of suicide or suffering from mental illness to mental-health help resources; 3. A general health promotion program targeting students’ awareness on healthy/unhealthy behaviors; Objectives of the research program are: I. Gather information on health and well-being in adolescents - Produce an epidemiological database for adolescents in Europe containing data on student's healthy and at-risk lifestyles and their relation with health measured by well-being, depression and suicidality. II. Perform interventions in adolescents leading to better health trough decreased risk-taking and suicidal behaviors III. Evaluate outcomes of interventions in adolescents from a multidisciplinary perspective including social, psychological and economical aspects IV. Recommend an effective trans-cultural model for promoting health for adolescents in Europe -Provide information for evidence-based prevention programs for adolescents in culturally diverse populations -Increase awareness and knowledge in policy makers, professionals and the public. -Disseminate results through a public website, media, health promotion conferences and through events focused on adolescents such as pop concerts or sport events."