To answer this question, we need to ask where the content is being used. If the content is being used in Switzerland, Swiss copyright law will apply. This is also the case if the teacher includes the third-party content in a PowerPoint presentation, which he prints out and hands out to his students and which he only does in Switzerland. The teacher benefits from the limiting provisions of copyright – in this case the private use for educational purposes, Art. 19.1 CopA – and he may use the content under certain conditions without consent of the author.