Poor behaviour in schools is a significant factor undermining student achievement. International data suggests behaviour in Australian schools is among the worst in the world, and reviews have found many teachers are not given practical, evidence-based classroom management strategies in initial teacher education courses. Strong, supportive school leadership is crucial. Schools with high standards of behaviour have common practices that can help all schools maintain the orderly, safe culture necessary for quality teaching to take place, optimal learning to occur — and for children to flourish.