Schools were alerted by the police to almost 600 pupils affected by domestic violence in the first year of a new scheme.
About 135 schools in the Downpatrick, Newry and south Armagh areas took part in Operation Encompass in 2021-22.
Operation Encompass enables the police to tell school staff if a pupil has been affected by domestic violence.
Schools in the scheme were informed 400 times about such an incident in just five months from February to June 2022.