... design of the field-study. 1. 1 IntroductionIt is a common assertion that materials in general play a crucial part in language learning(Robinson, 19 91; Nunan, 19 91) . This accounts for the fact ... approaches 13 to text analysis, from the early register analysis associated with the identification of keygrammatical elements of scientific communication (Barber, 19 62; Swales, 19 71) torhetorical ... functional/notional approach (Trimble (19 85) andLackstrom, Selinker, and Trimble (19 72)) and to the dominant approach of today, genreanalysis (Swales, 19 90; Bhatia, 19 93). The register analysis shows...