Travel and living abroad is a great experience, especially in this increasingly global world. I lived in Geneva, Switzerland for one year as a junior in college. Currently, I also live abroad. I think that 10 months abroad is too much for someone in high school and agree that a summer program is much better. For Americans, culture shock can be really overwhelming, and so a shorter stint may be more positive (e.g., 6 weeks) than something longer. When I went, it was through the programs offered by my college, but I bet with a bit of research on the internet, he can find something suitable. At that age, living with a family is the best bet. I would suggest trying somewhere where he has the most language experience, like Spain. And don't worry Mom, there are toilet paper and antibiotics in Spain too!! He just needs to know that if he feels unsafe or if there are major problems, you'll have a plane ticket home waiting for him. Happy travels!