In this thesis, the application of augmented reality, AR, is presented by creating an application for education. In addition to the process of formulating a strategy for the realization of the idea, the theoretical part of the paper contains theory within extended reality, XR, as a concept for understanding the terminology and parameters crucial for the application of augmented reality, explaining augmented reality, including current trends and problems in its application. In the experimental part, the elaborated idea of the educational application is presented, and all the procedures for the realization of the application solution as well as the method of education with XR technology are presented and explained. The application is intended for high school students with the aim of raising the user experience that facilitates the adoption of materials using smartphones. In addition to the user experience, the availability of digital content to students is also emphasized. After the development of the application, a research was conducted at the Classical Gymnasium in Zagreb, based on which feedback was obtained on the use of the application according to defined hypotheses. According to these results, including the theoretical and experimental part of the paper, a future upgrade of the application was designed so that it could be used in education. The future of augmented reality applications, AR applications and the direction in which XR technology will move are united in the conclusion of the paper.