This master's thesis presents the development of activities for the chapter on electric charge. The activities are based on my own investigation of the behaviour of conductive and
non-conductive materials when a charged body approaches them from different directions. The structure of all activities follows the ISLE approach. The acronym stands for investigative science learning environment. The aim of the activity was for the students to experience solving the physics tasks like a scientist, taking responsibility for the set learning objectives. The activities were tested on three different groups. Each session was recorded. Based on the students' answers on the worksheets and an analysis of the videos, we created an overview of the success in solving each part of the activity. We paid attention to typical and less typical difficulties that occurred within a class and looked for more general solution patterns that occurred in all classes. A comparison of the test results before and after the activity shows an improvement in the students' understanding of the microscopic model of charge distribution in conductors and non-conductors. In addition, a post-activity survey shows that students responded positively to activities that promote a scientific way of thinking.
Based on the discussion of the solution to the individual activities, improvements were suggested for further work that would enable students to acquire new knowledge more effectively and consolidate old knowledge.
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