The host family will treat you like one of their children. They will do your laundry and want to stay in close communication with you.
You should be given a key to the apartment/house.
Most families live in small apartments and are used to close quarters and do not have the same privacy norms we may be used to. Don’t be surprised if while you are out someone goes into your room to make your bed or rearrange things.
Expect to be invited to events, meals or outings with your host family after school or on the weekends. Andorrans and Spaniards are proud of their culture, cities, and networks and will want to share them with you. Try to say Sí!
Bring a small gift for your family (and children). It could be something from MIT or from your hometown. A mug, magnet or local candies. Make sure it’s wrapped well so it doesn’t break on the way.
If you are going out for the evening, let your host family know. It’s ok if you will be out late, but they need to know not to use a double lock on the door if they go to sleep before you return!