The adolescence is an essential and formative period of life, when it comes to the development and stabilisation of identity. Both, self-perception as well as the awareness of others, is important for the creation of identity. Regarding this, the personal environment, which is partly self-chosen, partly unintentionally arranged, plays an important role. Especially in the penal system of the youth, the question is posed, how the involvement with identity can be supported, as through the isolation from the outside world – notably in view of the awareness of others – a special situation is given. This thesis deals with the educational requirements while being imprisoned and is concerned with the question, how group work in this respect can make a positive contribution. An example therefore is the approach of the theme-centered Interaction, which concentrates on a group consisting of equally important members and includes their problems and deficits. In addition to this it provides a space for the exploration and development of identity with the help of self-perception and the awareness of others.