On November 27, the Department of Education of the City Hall of Łódź in cooperation with Youth Sociotherapy Centre inaugurated a series of conferences and training for directors of middle schools, entitled "Prevention as an Investment". The inaugural conference was opened with a 1,5-hour lecture by Szymon Grzelak, Ph.D. "Seven Levers of Effective Prevention as a Platform to Build a Comprehensive Strategy of Prevention Activities by the Local Government, Schools and Other Social Partners".