Attitude of teachers towards children of single-parent families compared with children of two-parent families. Preferred advises and the motivation for their advises in different cases, concerning pupils with behaviourial and educational problems. The cases describe children from single-parent families as well as children from two-parent families / size of school / ideological basis of school / teachers secondary schools: educational school-types / size of municipality in which school is situated / characterization of neighbourhood in which school is situated / teachers secondary schools: which subjects r is teaching and in which educational type of secondary school / whether r is a class tutor / teachers elementary schools: in which class ( "groep" ) r is teaching. Background variables: basic characteristics