Traditional drug education in schools has little or no effect on young people's tendency to take drugs such as P, researchers have warned.
A Massey University review says bringing in experts to teach about the dangers of drugs and alcohol does not lead to a long-term change in student behaviour - mainly because teenagers have other stronger influences in their lives.
The research was dismissed by one of the country's longest-running providers, the Life Education Trust, as irrelevant academic criticism.
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