Contemporary Approaches to Prevention of Self-Harm in Schools and Online Environments

(ENGLISH) This Master's thesis focuses on the prevention of non-suicidal self-injury (NSSI) among adolescents in online environments and schools. Its aim was to map and analyze forms of prevention in these two contexts, compare the perspectives of key actors, identify the main obstacles hindering the functioning of a comprehensive prevention system, and formulate implications for practice. The thesis summarizes current knowledge on self-injury in adolescence, its functions, and its connections to mental health, the digital environment, and school-based prevention. It is followed by qualitative research comprising a reflexive thematic analysis of online preventive content and semi-structured interviews with prevention program facilitators and school prevention specialists. The results indicate that the online environment represents an ambivalent context for prevention, combining easy access to support with risks related to the normalization of problematic behavior. In the school setting, prevention efforts face significant institutional constraints, particularly limited capacities of educators and the lack of accessible follow-up professional care. The analysis further shows that self-injury manifests in school practice in various motivational forms, which require differentiated preventive and...