Jak nauczyciele i uczniowie rozwiązują zadania matematyczne, czyli o poprawnych i niepoprawnych rozumowaniach

The teaching and learning of mathematics is done mainly by solving specially selected tasks. The most significant are those which contribute to the development of mathematical reasoning in students. In this paper, we present the results of the research carried out to check the extent to which students’ and teachers’ reasoning (correct and incorrect) coincide with each other. The obtained results indicate that certain incorrect strategies are so common to students and teachers that we can talk about a kind of pedagogical inheritance. Probably, some teachers teach in the same way as they were taught, unconsciously pushing their students to the path of faulty solutions.