Why is there inadequate education in so many places?

Insufficient number of school buildings especially in remote areas.
Lack of Qualified Teachers and their unwillingness to work in remote areas where there are limited amenities.
Uneducated parents unable to help educate their children.
Families unable to afford the cost of transportation and supplies necessary to educate their children.
Increasing number of orphans and "legal orphans" whose parents died or stayed behind due to national disasters, social / civil unrest, wars, and/or other common political, socioeconomic reasons.