, begs to differ. Researchers David Evans and Fei Yuan reviewed 267 studies of education programs from 54 low- and middle-income countries to find the most effective ways to get more girls in school and improve their learning. Globally, more than 130 million girls remain out of school, according to the World Bank, due to poverty, child marriage and violence. Instead of only examining girls' education programs, they looked at all kinds of programs. To measure access, they analyzed enrollment rates, attendance, drop-out, graduation and completion rates, and to measure performance, they looked at test scores. Their biggest finding is that gender-neutral programs — such as handing out cash aid to families of school-aged children