This e-book of Health Education examines the issue of sex education and aims to stimulate debate among academics, policy makers and educators. A key concern in many areas of public policy is the extent to which research findings filter through into policy and practice and sex education is no exception to this. The UK has wide network of academics currently engaged in research on issues related to sex and relationship education who help to keep the issue high on the political and academic agendas. There remains however a gap between research, and policy and practice, which the five articles in this e-book aim to fill.