Cathay Future is the obvious choice if you are finished at secondary school. You will be well taken good care of, and will be together with about 12 others from Denmark.
D&J is American-Chinese led program. You are expected to have special interest in teaching, and to have some experience with children. You will receive monthly pocket money to cover all your travel expenses.
Kevin's is for the individual traveler who wants to get a feel for the authentic Chinese way of living. At Kevin's you live in your own apartment. - Also recommended for couples.