I don't think allowing school kids to stay in school for a longer period of time would increase the quality of public education. I think we need to improved and/or completely changed the curriculum in most public schools by created a curriculum that will suit each student's individual interests and do away with the general liberal arts curriculum; I don't think we should be worried about which nations contain the highest standardized test scores compared to our nation test scores. That should not be a priority concerning improving the quality of education a student received. Not to mentioned summer vacations are an american tradition . Just my 3 cents.