In this paper, a number of materials from different pedagogical sources will be analysed from the point of view of their suitability fon the ESP class. Teaching Eaglish for Specific Courses has, in the last few decades, become an optirnal way of adaptian linguistic needs to increasingiy diversified professional and social demands. Consequently, ESP teachers have to become matenials designers,
... [Show full abstract] selectors and researchers of a multiple, complex reality to be brought to equally changiag teaching settings. On the other hand, these materials must observe centain rules (aboye all, they will comply with the requirernent of relevance), and be considered within the linguistic paradigms more favourable to this type of teaching. An example of material irnplementatioa through a concrete unit is provided, together with the sequencing, activities and skills involved. Speciai ernphasis is placed on authentic texts and sources provided by the students themselves, who tunn out to be, in many cases, the best orientation for the teacher.