The study involved 10 15-16-year-old students with the conclusion―F 70 mild mental retardation‖, 9th graders of correctional school № 59 in Ufa, RussianFederation. According to the International Classification of Diseases, children with the conclusion―F 70 Light mental retardation‖ are characterized by low cognitive abilities (IQ ranging from 50 to69) and reduced social functioning (International statistical, 2008). This group of students workedon the program with the use of 3D-graphics. Testing was conducted at the end of each lesson(Quality Control of Learning immediately after its acquisition) and at the beginning of the nextlesson (delayed check of the material learned).