Last week I visited our Peace Corps site and dropped in on our old land-lady. We lived in this "guest house" for two years while we were helping the local English teachers with two things: 1) honing their conversational skills; and 2) generating some interest in English among the students.
I might add, we also helped them by providing an outlet for complaining and gossiping in ways that they could not share with Thai people due to cultural constraints on negativity and raising difficult issues. Especially after a couple of wine coolers at a retirement party the Thai teachers would share things with us that they could never broach with their Thai friends. For some of them it was quite liberating. For me it was the best part of the trip.