This special issue concerns the content, function, and form of instructional materials dealing with second language instruction. The following articles appear: (1) "Deliberate Semantics--an 'Interventionist' Approach to Second Language Teaching Methodology," by A.P.R. Howatt; (2) "Sprechakte und Sprachunterricht (Speech Acts and Language Research)," by T. Ebneter; (3) "Materiels pedagogiques et/ou materiels heuristiques (Pedagogical Materials and/or Heuristic Materials)," by R. Richterich; (4) "Texte linguistique et representation iconographique (The Linguistic Text and Pictorial Representation)," by E. Arcaini; (5) "A propos de la conception d'une unite didactique dans le cadre du francais, language etrangere (On the Idea of Didactic Unity in the Framework of French, Foreign Language)," by A. Barrera-Vidal; (6) "Accuracy and Fluency as Polarities in Foreign Language Teaching Materials and Methodology," by C. Brumfit; (7) "La linguistique et le reste dans la conception des materiaux pedagogiques pour l'enseignement scolaire des langues secondes (Linguistics, etc. in the Concept of Pedagogical Materials for the Teaching of Second Languages)," by D. Coste; (8) "Lehrwerkanalyse und Lehwerkkritik aus der Sicht der linguistischen Pragmatik (Analysis and Criticism of Instruction from the Point of View of Linguistic Pragmatics)," by M. Pelz; and (9) Reve et Realite (Dream and Reality)," by G. Capelle. A synthesis article concludes the volume. (AMH)