They will get only what they put into their exchange experience. Students do better when challenged. Students should be placed in American history and American literature or American studies, if at all possible. Try AP and honors classes first. Traditionally the type of students in these classes will be more accepting of exchange students and include them socially.
Many teachers feel that the exchange students inspire their other students to work harder.
Students should be encouraged to take courses not offered in their country. It works better if the student is in at least one class with the student and eats lunch on the same period. Volunteers for buddies may come from the AFS, student council or language clubs. Responsibilities should be explained to these volunteers and those actively serving should meet periodically to discuss progress. It is recommended that each exchange student speak a different first language and that the nationalities represented enhance the ethnic makeup of the school.