We had a foreign exchange student 23 years ago. She went home and finishedoneyear of high school and came back. She has lived in the states near us ever since. As far as everyone is concerned, she's my sister. Her son is just another grandkid around my parents house. It was a great experience and our family learned so much (and still does) from her.
I'm so glad your exchange student had a great time. It's a wonderful opportunity for students.