Multimedia, animation and interactivity are common and powerful tools that can be applied in the learning process. In this diploma thesis we present an example of an active-learning tool. We have developed a conceptual model in the form of a web application called “Web Application for simulation of Cardan Grille”, which is based on the aforementioned tools and consists of learning material from the field cryptography. The application’s structure follows Mayer’s principles of the cognitive theory of multimedia learning. Based on simulation and problem-solving activities, this web application serves as a tool for developing abstract and spatial reasoning. It is intended for high school students. The analysis of results obtained from the pilot empirical study points toward positive learning outcomes that are consistent with the neo-Piagetian theory of cognitive development.
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