The first part of dissertation describes the problematic of problems in education and children prevention in period of early adolescence. Firstly have defined the specifics of this period of development, follow analyse of reasons the birth of education problems by personal factors view and also by influence to social individual environs. After below the description of behaviour problem forms (non-aggressive and aggressive conducts), prevention system in the Czech Republic and description of institutions which helps to solve already incurred problems in education. The second part of dissertation is getting closer to prevention activities of concretely Non- Governmental Organization. It's concerned into the program called "Chobotnička - chance for children and their next development. This part describes targets of program, organization and concept how to choice and select the clients and also including the example of lesson. Integral part is description of each methods using in program. For overall touch in to the work with clients are added case studies. Conclusion of dissertation gives heed to program analysis by provider and clients view and concerned to question about future of this program.