This study was based on corpus linguistics. To do this corpus based study the first 5 units of the book “concepts and comments” typed and submitted to concrodle software online program. The output was shown in the form of word clouding and concordancing. The participants were 270 general English students of Islamic Azad University, Jahrom branch which randomly served in control and experimental groups. Word clouding was used in the experimental groups to find main idea and concordacing was used to teach vocabulary as well as reading comprehension skill. While in the control group this intervention was not available and the students did not have access to word clouding and concordancing. Each session test of reading comprehension and vocabulary conducted at the end for both groups. The result of repeated measure ANOVA for five exams revealed that though both groups improved from the first exam to the fifth, this improvement was significant for experimental group. In other words control and experimental groups performed differently in each exam in favor of experimental group. This means that concordancing had a positive effect on finding main idea, reading skill and vocabulary learning after a repeated time.

Dr Azadeh Nemati is an Assistant Professor in Iran, majoring in ELT. She is the member of Network of Women Scientists of the Islamic world and also the editor in chief of some international journals. She has already published + 10 books and + 30 articles nationally and internationally. She has presented in many international conferences and also supervised some MA theses. In 2010, 2012 and 2014 she was selected as distinguished researcher in the University.