NEMSILAJOVÁ, Ivana: Educational software for Hejny´s method of mathematics teaching – environment Bus (Bachelor thesis) – Comenius University in Bratislava, Faculty of Mathematics, Physics and Informatics; Department of Applied Informatics. – Supervisor: RNDr. Peter Borovanský, PhD.: FMFI UK, 2020, 43 pages The goal of this bachelor thesis is to develop a mobile application for the Android platform. It will be a complementary tool for teaching the Hejny´s method Autobus environment. This environment works with tables and data analysis. The application is targeted at pupils in primary schools, therefore it must meet the rules of didactic software. It consists of four levels gradually increasing in difficulty. The theoretical part of this thesis is focusing on education software, the Hejny´s method, and the similar solutions, which have already been created. The practical part consists of the design of graphical user interface, levels and their gradation, description of the implementation, and the process of application testing with pupils, including the results. Key words: Hejny´s method, mobile application, Autobus, Android, didactic software