When bullying turns to violence: Do schools know what's really going on?

We test school boards across the country by asking one question: How many students have attacked other students? The majority of schools refused to answer, so we decided to just ask students themselves. We commissioned a national survey asking youth about their experiences with physical and sexual violence, homophobia and racism — from kindergarten to grade 12. This months-long CBC News and Marketplace investigation reveals student-on-student violence in schools is all too common, and drastically underreported.