There are some of us who were so bored in High School that we ignored the teachers.  There are some of us who had higher grades in college than we did in high school in English, Math and Scientific subjects.  There is one student  that I know personally  who was offered a Fulbright opportunity at the U of O  after attending and  completing a degree there, even though he started college  three (3) years after graduation from high school  He  started at and is still  making a six figure salary  because he was 'tired of school'.  You are too tied to your normative attitudes as to what should happen in someone's educational life at particular times.  Think' outside the box' and give young people a chance to figure out their own goals; they aren't stupid or uneducable just because they don't follow a 'traditional' education path