With respect to costs, it’s worth keeping in mind the opportunity cost of technology. For example, research by economists Ted Miguel, Michael Kremer, and others has conclusively shown the value of 50-cent deworming pills for education. The pills free children of parasites and eliminate one of the dominant reasons for student absenteeism in many developing countries. At a cost of only $ per student (over several years), countries with high incidences of parasites can effectively add the equivalent of an extra year of schooling. Similar results can be had from provision of midday meals, iron supplements, and teaching assistants, and all at a much lower cost than that of computing technology.