When a child goes to school for the first time, it is usually the first major change in his life. The relative freedom of home life where he can run around, make noise and where he is usually one of a few children under his mother's eye, is exchanged for the relatively disciplined atmosphere of school where he has to sit still, is but one of a larger group in the classroom and where he has to do as he is told (UNESCO, 1968). It is an even greater change if the child completely leaves home to go to boarding school as often happened with the Apaches in America (Liebe-Harkort, 1980). In order to facilitate the structural change in the child's daily life, the language used at the new school should be the same as the one used at home so that he is not confronted with a completely new linguistic as well as social situation.