Many publications describe a negative influence of such unarticulated, informal „education” on school climate. I state that „hidden curriculum” can be shaped by adults intentionally at the same time remaining unwritten, not verbalized but valued. Teachers can teach attitudes, skills, values, even transmit knowledge, through the way they teach and relate to others. School administrators can shape existing structures and procedures in such a way that they express an important for school value which is a safe and peaceful climate. Many informal codes of conduct, but also the organization of school space and time can make real difference in school climate. Hidden curriculum is a crucial part of school culture understood us a way in which a group of people live, think, feel, organize themselves, celebrate and share a system of values, meanings and views of the world. It is a way in which they articulate them, visibly, in language, gestures, symbols, rituals and styles.