The objectives of this two-arm phase-IIa randomized, controlled study are:
* to prove whether the combination of a clinic-guided personal counseling with a therapy-assistive digital support (blinded care approach) and a training of digital and mental health literacy is superior to a teacher-guided training of digital and mental health literacy only (treatment as usual) concerning the reduction of psychiatric burden in adolescents.
* to improve the well-being and level of participation in adolescents at risk for psychiatric disorders.
* to reduce the expression of psychiatric symptoms in adolescents with enhanced psychiatric burden.
* to test whether the combination of a clinic-guided personal counseling with a therapy-assistive digital support is well accepted by students, their parents, and teachers.
* to identify individual factors predicting the improvement of well-being and level of participation in adolescents as well as the acceptance of the prevention program in all subjects involved (students, parents, teachers, psychologists).
* to investigate whether the clinic-guided personal counseling with a therapy-assistive digital support causes reduction of primary and secondary costs in the psychosocial support system and represents an economic advantage.