The number of teachers in each school ranged from 1 to 52, and the total number of those in the sample was 472 compulsory schoolteachers, instructors and school administrators.
Heildarfjöldi kennara í hverjum skóla var á bilinu 1–52 og var heildarfjöldi þátttakenda í úrtakinu 472 grunnskólakennarar, leiðbeinendur og skólastjórnendur.