The relevance of the investigated problem is caused by the need to study the negative effects of juvenile offenders placement in places of social exclusion, violations of their social and legal development and effective methods of formation of socio-legal competence of students of closed type institutions. In this regard, this article aims to identify the causes of distortion of legal concepts, guidelines and settings of this category of children and methods for correcting the components of their legal consciousness. The leading approach to research of this problem is the method of projects allowing to consider this problem in a complex way as a purposeful and organized process of application of a person focused and active techniques of legal training and education for effective implementation of legal educational activity in establishments for minor offenders by a teacher. In this article the reasons of emergence of a distortion of components of legal consciousness of pupils in establishments of closed type are opened, the qualitative personal characteristics of pupils and socio-pedagogical prerequisites allowing to create the threshold level of social and legal competence of minors in the conditions of isolation from society are revealed, ways of increase of efficiency of right educational activity in establishments of closed type by means of technology of design training are presented. Materials of the article are of practical value for teachers, psychologists and other experts working with minor offenders.