Why Do Native Americans Have Such A Low Rate In College Graduation?

The schools in almost every reservation has some sort of financial problems where they can't afford to buy updated books or technologies to teach there students with. But in some areas they have schools that can afford everything. Then there are the commuters, some kids go to school from long distances like 30 to 40 miles away. So when some of these kids graduate highschool there sick and tired of school. Its like having a job, which you have to travel 80 miles everyday. Some of those could be the factors, then there are a lot of students that have family issues alchol and drug use. Teen pregnancy. Then there is money some people can't afforded. Then there are financial assisstance which there are only the lowest income families can get. But all of that doesn't get paid for college. There are a lot of native american colleges that are cheap but things that go on those colleges, a lot of students get caught up in it. The cheap colleges don't offer a whole lot either, they are only two year colleges.