We hypothesized that an effective way to improve the methodology for such a subject area asnatural science, which makes it possible to increase the level of acquisition of knowledge bystudents with intellectual disabilities, will be including in the computer educational technologyanimated 3D-graphics, aimed at demonstrating the structure and functioning of the organs andsystems of the human body. We decided to check this assumption in biology class (―Man‖ section)in the study unit ―Musculoskeletal system. Skeleton‖. Checking the effectiveness of this technologywill also make it appropriate to develop 3D-products for the acquisition of other sections ofbiology, as well as raise the question of the application of this technology in the study of otherschool subjects in the special school, such as geography and technology.In order to establish the differences in the results of students‘ immediate and delayed testingof the studied material, we used the Mann-Whitney test.