
For the purpose of this study, we approached 14 randomly selected schools in Zagreb area. To represent total school system in Zagreb and we stratified randomisation procedure to select 5 grammar and 8 vocational public highnschools as well as 1 private high school.
We thank allschools for their enthusiastic participation and cooperation.
And those school are:
· II. Grammar school
· V. Grammar school
· VII. Grammar school
· X. Grammar school
· Tituš Brezovački grammar school
· Tehnical vocational school
· Hotel-turist vocational school
· I. Tehnical school Tesla
· Natural vocational school Vladimir Prelog
· Private classical grammar school with the right of publicity
· Vocational school of applied art and desing
· Tehnical vocational school Ruđer Bošković
· 3. Economical school
· Catering-tourist school