This publication contains a summary of the discussions and conclusions of a Council of Europe symposium on the organization of modern language teaching/learning in the form of a unit/credit system, in order to allow for an approach based on the individual motivations and capacities of the adult learner. Principal discussion topics include: new forms of organization of the linguistic content; types of evaluation within a unit/credit system; and means of implementing a unit/credit system in the teaching/learning of modern languages in adult education. Conclusions include practical suggestions and recommendations for instructional organization and research. Appendices contain a list of participants and a schematic inventory of language roles, activities and uses, entitled "Toward a Situational Definition of Language Contents in Foreign Languages." (AM)