Discipline Crisis: Classroom Disruption Costs Australian Teachers Nearly a Third of Lesson Time
A national survey found that school teachers lost an average of nine minutes out of every 30 minutes of lesson time to student misbehaviour.

TL;DR
- Australian teachers are losing nearly a third of their classroom time to student misbehaviour.
- A survey of 377 teachers found an average of nine minutes per 30-minute lesson is lost to disruption.
- This amounts to roughly 12 weeks of lost learning each year.
- Sixteen percent of teachers reported losing the majority of their lesson time to misbehaviour.