Teen-Agers From Abroad: A group of 59 foreign teen-agers arrived by bus yesterday at the First Baptist Church, where they were met by members of the families with whom they will live for a year. The exchange program brings the students to America to gain first-hand experience with American school, family and community life. Sponsored by the Michigan Council of Churches, it is administered by the Ann Arbor-Washtenaw Council of Churches. Three of the teenagers will live with Ann Arbor families, one with a Chelsea family and the others will go to other Michigan cities.