Dr. Abbas Ali Zarei is a member of academic staff at Imam Khomeini International University in Qazvin, Iran. He has written and published 16 books and translated four others. He has also had 26 articles published.Maryam Sahami has got an MA degree from Islamic Azad University, Takestan, Iran. She currently teaches in several language institutes.

Collaborative teachniques have had their place in discussions of language learning for several decades. It is believed that there are around 100 collaborative techniques. One of the responsibilities of a good teacher is to make sure to implement the more productive techniques to facilitate language learning. Two of the vital elements of language are vocabulary and reading comprehension. There is a paucity of research as to the effect of collaborative techniques on these elements, and the few available studies have often reported contradictory results. To fill part of this gap, the effects of five selected collaborative techniques, namely, jigsaw, rotating circles, snowball, think-pair-square, and word webbing on reading comprehension and vocabulary learning are investigated in this book. Results are presented in tabular as well as graphical forms and discussed in sufficient detail. The findings reported here may have implications for teachers, learners, and coursebook designers.