The children come both from Norwegian families living permanently in Trondheim and families from overseas living in Norway between one and five years. The parents of overseas children work in the oil industry, at the Norwegian University of Science and Technology, in medicine and in a variety of other businesses in the city. To help develop children's confidence, Birralee creates a positive learning atmosphere encouraging self-discipline, natural inquisitiveness and independence. Classes are relatively small and the staff is fluent in English and Norwegian.