What prevents kids from going to school and how can education respect traditional culture while also teaching modern skills?

Playing soccer with the village kids every day, we realize that Regina’s family can’t even afford to send her to the public school. Why is there still a huge education gap between the rich and the poor in Guatemala if the government provides free public school? This gets us thinking about how an education gap prevents kids from indigenous families from learning Spanish. What effect does this language barrier have on someone’s ability to get a formal job, travel to a big city or even visit a hospital?