Some personalities just don't mesh. Understanding Differences, Communicate Expectations Cultural differences. It all boils down to just that. In most European countries, the children mature earlier than in the United States. Alcohol is served with family meals.
Parents trust their children to come and go as they please.
Teens do not have a set curfew. Probably very different. The one thing you must do is communicate your rules and gently remind the students if they make a mistake. Remember their parents probably treat them differently than you treat your children. Mike Kocher points out, however, the most successful placements are those where the student has all the family rights and obligations.