I’m in the same boat, planning on a move to Spain next year. Do I homeschool, American school, International school, or Spanish school?
My best friend moved from Argentina knowing very little English when he was 14. He distanced himself from Spanish-speaking students and immersed himself fully. His grades were fine, he did quite well, and within four months he was comfortably up-to-speed. Now, he’s 34, very successful, and other than some pronunciation issues speaks and writes in more impressive English than the vast majority of Americans I know.
A high school friend moved from India to Brazil when she was 6, to Germany at age 9, and the U.S. at age 11. She was in accelerated classes in high school (except in English until she kind of bullied her way in), got a 4.0 GPA in college, and got a medical degree at Harvard. And she speaks a number of languages.
I know this is anecdotal, and these are smart people, but it seems like when given a challenge, kids can rise to it.
The American School in Madrid would be great - it has 800 students, the size of a regular American high school. But the price tag - $24,000 to 28,000 for middle school and above, not to mention the enrollment/application fees which total about $10,000 to start - too painful. Homeschooling sounds a little lonely and limiting of their immersion experience. My vote? Spanish school. Sink or swim.