CZ-PL borderland is a space where, to a large extent on both sides of the border, the population was replaced and the ties that existed at many places were severed. Elimination of the mental barrier in particular, associated with the existence of national borders (especially the thinking of us vs them) is a key prerequisite for sharing a common space. The role of schools is crucial: education holders should lead by example. Therefore, we want to create a cooperation network of teachers from both sides of the border.