Northland schools have recorded 1085 disciplinary incidents involving students so far this year, with almost 15 per cent of cases related to drugs.
The students have been stood down, suspended or permanently excluded, according to Education Ministry figures revealed to the Northern Advocate.
However, more children could remain in school if the Rubicon youth drug education and support programme was extended right across Northland, chief executive Jenny Rooney-Gibbs said.
The figures, released under the Official Information Act, show the number of students caught with drugs is declining.
Of the 158 drug-related incidents this year - 14.56 per cent of the Northland total - 12 led to a student's permanent dismissal from school. Mrs Rooney-Gibbs said the majority of the 158 drug cases were in the Mid and Far North as Rubicon worked closely with secondary and intermediate schools in Whangarei and Kaipara to deal with problems as they arose.