Keep in mind that there are many organizations and they are not all created equal by any means. School systems should have a written policy in regard to foreign exchange students in their rules and regulations. If you do not, it should be written to protect all individuals involved. Consultations services and programs concerning foreign exchanges are available. You aren't expected to make wholesale changes in the way you do things, just simple modifications.
Foreign students are accustomed to certain formalities.
Asian students, for example, do not like to be touched beyond a handshake. Latin Americans greet each other with more affection than we do. Use the students to show how the same operation may be done in their country after their language skills have improved. Some foreign students need to practice forming English letters. They copy better from paper than from chalkboard or overhead to paper.