Breaking the cycle of poverty. When a girl is educated, she does not only become empowered to become positioned to break intergenerational cycles of poverty. A girl gains access to proper schooling, and who stays in school is likely to rise to a position in society that enables her to break the cycle of poverty. She becomes not only positioned to earn a living, but to, one day, become a giver or a resource to her family.
Increase a country’s GDP. Some studies show that an increase in girls' education raises the average GDP for her country by 0.3 percentage points. This means that if 10 percent more adolescent girls attend school, a country’s GDP increases by an average of 3 percent.
Improved health. There's a direct relationship between a girl's education and her overall health. An educated girl is less likely to contract sexually transmitted diseases since she would have learned to be more caring towards herself, develop self esteem, and would have gained access to information that would enable her to protect herself. For example, it is likely that she would be able to read information towards the goal of safety and health.
Give them a voice. Denying a girl access to education makes it hard for her to learn the skills that would position her to become a leader, and a contributor to her country's gross national product. Education is, in fact, a government investment for which it should expect a high return. A failure in girl's education, is a country's failure.
"And here’s what we know. We know from experience that nations are more successful when their women are successful. When girls go to school -- this is one of the most direct measures of whether a nation is going to develop effectively is how it treats its women" (President Barrack Obama). (Source)