How does the global youth exchange work, aka foreign exchange students?

I need to know for my book about vampires. No not like Twilight and not to be cliche with the second main character being a foreign exchange student, when he was born the dreams of colonies living in America was only a tiny thought. Oh yeah I'm looking for ANSWERS that why it's called Yahoo ANSWERS not Yahoo RANTS! I couldn't care less if this book gets published and you hate it just because one of the mythical creatures in it are vampires.How does the global youth exchange work, aka foreign exchange students?Wow, you really know how to get people to answer your questions...How does the global youth exchange work, aka foreign exchange students?http://lmgtfy.com/?q=Global+Youth+Exchan