The country's exam body is considering introducing digital technology in a bid to stamp out cheating.
As more than 145,000 students prepare for a month of externally assessed NCEA exams, the New Zealand Qualifications Authority is assessing whether to introduce software called Turnitin.
The scanning tool, used by universities and polytechnics, matches assignments against millions of internet pages, electronic journals and other submitted assignments. A report helps staff judge if work has been copied.
NZQA deputy chief executive Richard Thornton said Turnitin was one of several tools the authority was looking at in the school digital transformation programme.