![rawpixel-660721-unsplash (1)](https://www.nationalelfservice.net/cms/wp-content/uploads/2018/07/rawpixel-660721-unsplash-1-150x150.jpg)
Neil Humphrey is impressed by the STARS cluster randomised controlled trial published today in Psychological Medicine, which evaluates the effectiveness and cost-effectiveness of the Incredible Years Teacher Classroom Management programme in primary school children.
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