Promoting Well-being Among European Adolescents - an Inclusive and Digital Program to Strengthen Social-emotional Competences (SEL4@ll)

Inclusion Criteria

Inclusion Criteria Participants must meet all of the following criteria to be included in the study: * Be within the target age range (typically 10-16 years old, corresponding to 5th-6th grade of primary or 1st-4th year of secondary education). * Have written informed consent provided by a parent or legal guardian. * Complete all three measurement points (pre-test, post-test, and follow-up assessments). * Attend school regularly (i.e., not chronically absent). Exclusion Criteria Participants will be excluded from the study if they: * Do not obtain parental/legal guardian consent. * Have significant cognitive, developmental, or language impairments that prevent them from understanding or completing the intervention or assessment tools. * Are absent for a prolonged period during the implementation phase (e.g., due to illness, transfer, or other reasons). * Participate in another intervention targeting similar outcomes during the study period, which may confound results.