To educate a girl is to build a healthier family, a stronger community, and a brighter future. Unfortunately today, 62 million girls around the world are not in school. Half of them are adolescents. We know that countries with more girls in secondary school tend to have lower maternal mortality rates, lower infant mortality rates, lower rates of HIV/AIDS, and better child nutrition. But too often, a girl who could change her world for the better is locked out of that future by the circumstances of her birth or the customs of her community.