A discussion of issues in third-language instruction and language teacher training focuses on the situation in Finland, where a second and third language is required of all students and it is possible to study as many as six languages in addition to the native language. The Finnish school system is explained, noting that second and third languages are available to students in elementary and junior high schools. Because of the dual system of teaching credentials (general and subject-specialized), most second-language teachers are also third-language teachers. With regard to third-language learners, it is noted that in general, a great deal of transfer from second-language learning occurs. Possible fossilization of attitudes and strategies is also seen as a concern. Student choice of a third language, if not prescribed, can reflect fashions or political movements. In Finland, school third-language instruction is provided by non-native speakers, with the same potential for fossilization as with students and the additional disadvantage of teacher preferences and prejudices about the languages they speak and teach. Teacher training includes a practice teaching component. Finland's supply of good students motivated to become teachers is seen as adequate. (MSE)