The purpose of this thesis was to examine how artistic expression affects students' concentration. Also, one of the goals of the research was to investigate whether the use of digital content or the daily use of the application and engaging in artistic expression, affects the improvement of concentration. The research is divided into two parts, where the first part is focused on sixth grade elementary school students aged 11 to 12 years, while the second part of the research is focused on fifth and sixth grade students aged 9 to 12 years. On the occasion of the research, the first part was conducted in Zagreb during two lessons of fine arts, in which the students dealt with their own feelings together with their hobbies and interests. About two weeks before the start of classes, the students received a link to the LinijApp application, which is programmed and designed exclusively for research purposes. During that period, each student independently solved one task on the application every day with a focus on line drawings. In addition to being an introduction to the content of the class, the application served as an aid to the students in their art work in which they had to visualize their own hobby or occupation with different types of lines, and each chosen line was supposed to show certain feeling associated with that hobby/interest. Furthermore, the second part of the research took place in the elementary school in Križevci under the guidance of a colleague teacher. Here, the students again solved the tasks in the application on their own smartphones, but their task in class was to imagine a feeling of their choice and visualize it with lines according to flow and character. The idea was to construct the research through topics that are close and interesting to the students, therefore their feelings, everyday life and activities that they like to do in their free time prevail in their artistic expression. All these mentioned segments together with the worksheets (survey and analysis) and the discussion at the end of the lesson helped to answer the questions important for research.