Project description: The three-year Erasmus+ project aims to directly enhance mental health and mental health literacy, and more indirectly, to promote diversity-awareness among students. For this purpose, an evidence-based, adaptive, target group-specific, diversity-sensitive and freely available digital tool for students (aged 12-15 years) is being developed with the partner countries Bulgaria, Slovenia and Poland. The digital me_HeLi-D tool will be modular and include activities to promote mental health literacy, resilience, mindfulness, and help-seeking behaviors, as well as activities to prevent anxiety and depression. In a participatory approach, it will be co-developed with students and teachers from partner schools in Austria, Slovenia and Poland, rolled out in three countries, evaluated for its impact on students' mental health, and finally made freely available in four languages (English, German, Polish, Slovenian).