This thesis deals with the collection, sorting and by reflecting artistic expressions of a particular child during the school year. The theoretical part contains information obtained from the study of literature concerning the concepts of art education, perception, sensitivity, imagination, creation, communication, portfolio assessment, children's drawing, ontogeny, psychiatric diagnosis, developmental disorders. The empirical part focused on the development of intellectual and social abilities in connection with the development of drawings, a boy with psychiatric diagnosis. The work is processed by the methods of qualitative research. It is a case study with subsequent analysis results of operations,ie his artistic expressions.