Fritz Redl and his colleagues developed sophisticated and effective ways of working with extremely disturbed children – ‘children who hate’. Because this work was done several decades ago, there is the danger that this knowledge will be lost to contemporary counsellors and teachers who have to work with similar children today. The paper outlines the general approaches of milieu therapy and life-space interviews. It summarises seventeen techniques for controlling unacceptable behaviour in ways that do not contradict therapeutic goals and enable these difficult children to be helped.