Name: G.I. Jonesy
Within the internal structure of the United States, to accomplish such a thing would be as simple as spreading out the funding equally among all school-districts. Either that, or possibly providing more funding for poorer districts. Congress could vote on it tomorrow, and by Tuesday, the poor would be on their way to education-equality. In many industrialized nations today, that solution is already the common thinking. So what if the thinking were applied globally? Meaning, rich countries help the poor to provide a first-world education to everyone?
While it would require international relations that are more complicated than what people have within their own countries, it can be done. As a cost-benefit analysis, any honest person would conclude that the benefit outweighs the cost.