As part of an education strategy. I wonder if modern tools such as the preloaded computer tablet can be useful. You don’t need expensive tablets or the Internet for this to work in refugee camps and elsewhere. The idea is that the tablets come preloaded with the whole primary and secondary education curriculum in the refugees own language. Then for those who have missed out on school. With books, videos and exercises they can repeat old material when needed.
Content can be prepared in advance so you have something like the Opon Imo (Tablet of knowledge) for when tablets or other hardware are available.
There are more opportunities than having preloaded tablets. With KA Lite you get an offline version of Khan Academy which I think can be helpful.
To make it more possible I thought I add the idea of Computer Aided Book Exercises.
Looking around I think I have a simple alternative to the usual math exercises found on computers. I don’t think you should waste too much time and resources making them suitable for computer verification. Just provide a link to the answer or solution and let the user compare. Then let the user mark the exercise either successful or failed. If you group together the exercises you can let the user request more of the same or maybe suggest a clarifying exercise. Why you would do this is because it makes it very easy to copy exercises from books. Then with a lot more exercises you can begin to grade them on their knowledge testing and teaching ability.