The article presents the principles of the classes organizations in the school of the rational nutrition for children and adolescents with overweight and obesity, and also for their parents. The school consists of six interactive lessons, which explains the negative consequences of obesity, understand the basic principles of optimal diet. Each class has "minilections", that adapted for both children and parents and accompanied by interactive dialogues, which are attended by all family members of children who are overweight or obese. Presented own observational data for 20 families that attended school. A positive result was achieved in 15 families. The article analyzes the reasons that didn't lead to the expected result in 5 families.