…means that we don’t simply make up what could be useful for high school students, helpful for learning or in any way useful in teaching. Instead, we take research on teaching, carried out for many centuries, from e.g. Comenius (16th/17th century) to e.g. Reinmann and Mandl (20th/21st century) into account. This doesn’t mean that the wheel has to be reinvented every time. Our ideas are based on those of the many scholars who contributed to the current level of research. At the same time, our goal is to contribute by supporting, disproving or weakening theories so that teachers and researchers can take advantage of them, and therefore profit from our work.