Abstract
The aim of this paper was to examine the Study of Effect of Extensive Reading on Enhancing Reading Comprehension and Word Recognition of Iranian Learners. Reading skill has played a crucial role in the processing of teaching English language to Iranian EFL students in Iranian universities. In this paper, 90 Iranian EFL students from Bordkhun high school, in Iran participated and divided into the experimental and control groups. Each group contained fifteen able readers, fifteen average readers and fifteen less able readers based on their reading comprehension and vocabulary scores in a multiple choice test. The texts used in the test were narrative texts. Both the experimental and control groups received reading instructions in their classes for ten weeks while the experimental group given extra two books (story books) to read outside the classroom at a rate of two chapters per one week(one chapter from each book per week). At the end of ten weeks, both groups were administered a post-test. In addition, the reliability of the reading comprehension and vocabulary test used as the instrument in the experiment was calculated by the SPSS program version 16. The reliability of the test (KR20) was 0.94. The findings of this paper showed that there was a significant difference in reading comprehension ability and vocabulary recognition between the experimental and control group at the level.