I've seen some collage text books here that would be equal to a 9th grade education in the States. I talk to a lot of people wanting to retire here because they speak "English" and yes some do. BUT they don't always have any comprehension of what they're saying. Another thing that bugs me is when you're talking to a person one on one and ask a question they reply with "me"? yes you, you're the only other person here. My best suggestion would be getting good text books and doing home schooling. Maybe even internet courses. At least you'd know what was going into their brains.