Corrupt politicians, the money is lost while pass in the bureaucrats hands , and the state doesn't surveillance.
Lack of resources, and the state send fewer resources.
Lack of education from the parents, when one parent has a grade of university, is more probability that the sons get some degree.
How it is evidence?
Bad results in world test about education like pisa test, also the local test results hasn't a good balance.
Its consequences?
The girls and boys stay in the street all day.
Increment the poverty because the poverty are inversely proportional to the nivel to education.
Possible solution:
Force to parents to send the childrens to the school, if is need make laws.
Build where is necesary and expand existing schools and gardens.
Expand benefits for the kids and youngs such as free public education.