Teenagers: The Evidence Base proposes that what works in parenting cuts across different philosophies and concepts. It draws directly on more than 1,200 studies, and indirectly on thousands more, to create a single evidence base and reference manual for parents. The knowledge base informing the book is vast, covering subjects such as child development, family systems, relationships, mental health and genetics. This has been condensed, for the first time, into straightforward ideas to support children's relationships, physical health, learning and play, behaviour, and happiness and well-being.