Christchurch head students are speaking up about sexual assault and harassment

More than half of Christchurch Girl's High School in a survey said they'd been harassed.

At least 20 students say they've been raped.

Christchurch Boys' High head Boy Henry Allott says not addressing misogynistic behaviours can often precede sexual assault and harassment.

He says this is why it's so important senior male student leaders across the country speak out as role models for all students.