the authenticity of three pfl textbooks from the cohesion viewpoint

authentic text is considered to be an important requirement of communicative approach and communicative foreign language teaching textbooks. the present research investigates the authenticity of three pfl textbook by answering the following question: “to what extent are the texts in pfl textbooks considered to be authentic?” accordingly the quantity and quality of cohesion discourse-marker distribution in three pfl textbooks (twelve texts) were analyzed and compared to some media texts (newspapers and articles posted on the websites). it was observed that the quality and quantity of the occurrence of cohesion markers are identical in two of the educational texts (written by ziahosseini and purnamdarian) and are very similar to media texts. however, the texts in the third book seem to be different in some degree. therefore, from the viewpoint of cohesion, it can be said that these three pfl textbook are not authentically the same.