The influence of schools as organizations and their staff members on delinquency of their pupils. interview ( deputy ) headmaster: structure of comprehensive school / pupil supervision / absence and truants / prevention of crime * interview supervisor: detailed account of pupil supervision, absence or truants / contacts with parents of pupils / discrimination between school for lower general secondary education ( MAVO ) and school for higher general secondary education ( HAVO ) or pre-university education ( VWO ) within comprehensive school / prevention of crime questionnaire teachers: number of hours teaching at comprehensive school / number of hours teaching at school for lower general secondary education ( MAVO ) / kind of section( s ) * interview pupils: pupil supervision / absence registration and suppression of playing truant / school activities / prevention of crime * questionnaire pupils: pupils closest peers in the third year / number of repeating on secondary school / pupils opinion about school: nice, boring, cosiness after school time, not looking forward to go to school, importance of getting a graduate for school for lower general secondary education ( MAVO ), repeating or unsatisfactory marks / behaviour of playing truant/ lessons and days / preference for playing truant with certain sections / reaction of school towards truants, justness of that reaction perceived by pupils, also with being to late at school / detailed account of steeling, vandalistic behaviour and aggressive behaviour towards other persons by pupils within school or outside school / home work / free hours / asking help by study-problems / results of end-of-year report for several sections / interest in several sections / popularity of teachers by pupils / number of times of sanctions on school / involvement with school activities / contact with peers after school hours / pupil webs / personal contacts of pupils with ( deputy ) headmaster / perceived discrimination between school for lower general secondary education ( MAVO ) and school for higher general secondary education ( HAVO ) or pre-university education ( VWO ) within comprehensive school / influence of observators on atmosphere in lessons observations: interactions between teacher and pupils / general characteristics of lessons Background variables: basic characteristics/ place of birth/ household characteristics/ place of work/ occupation/employment/ religion