My brother spent the last 10 years of his medical career serving as embassy doc in places like India, Turkey, and Mali. He waited to make that move until his two kids graduated from high school. He has said that had he known the quality of education (I realize this is not university level) his kids could have had in those environments, he would probably make the move while they were still in school, preferably younger. Those were probably largely international schools he is thinking of, and I have no idea what the story is on those, but I think he feels he missed an opportunity to place his kids in a more diverse, less America-centric learning environment.