My Turkish readers, please take a look at the new Turkish AFS website when you have time. Turkish AFS volunteers have launched this website, and it's an exciting project.
AFS is the largest international exchange program mostly for high school exchange students, and that's how my US journey started on 1996.
If you'd like to learn more about AFS and/or volunteer for AFS take a look at AFS website (English) : http://www.afs.org
Here's also more information about volunteering for AFS, if you are living in the States.