An important factor relating to education is merely getting people engaged in doing something - allow for productivity. You of course have to have a (safe) place for people to gather, make sure those people can get there, make sure they are fed, and then they can share and learn; health is an important part too of course. Once you have these base factors then education is the best thing to fill ones time with, as opposed to letting someone's mind go stagnant or worse yet get sucked into boredom; if you can get them also productive with agriculture or other productive activities, great - however those have a larger initial capital investment (equipment and natural resources). It's more complex than this of course.