All children and young people have the right to age-appropriate sexuality education regardless of gender, sexual orientation, ability or faith. Sexuality education provides knowledge, skills and positive values to determine and enjoy their sexuality, have safe, fulfilling relationships if one so wishes and decides, and to take responsibility for their own and for a possible partner's sexual health and well-being. Several international programs have been developed and recently published by the Population Council, IPPF and other coworkers, by UNICEF, and by WHO Europe. This chapter will briefly describe recent global development in sexuality education, and then, as examples, experience from two countries, Finland and Chile. The experiences from these school based programs suggest an important role of sexuality education.