Building support for Let Girls Learn. Let Girls Learn helps adolescent girls attain a quality education and enables them to reach their full potential. More than 62 million girls are not in school, and barriers to adolescent girls completing school are particularly significant. In some countries, fewer than 10% of teenage girls complete secondary school. The program brings together various agencies including the Peace Corps to address the range of challenges preventing adolescent girls from attaining a quality education. Let Girls Learn combines the necessary political will, diplomacy, grassroots organizing, and development expertise to create lasting change. The Peace Corps has expanded Let Girls Learn in 44 countries.