ABSTRACT The purpose of the present study was to explore if advance organizers with the help of MALL-oriented classrooms can help Iranian EFL learners improve their collocational knowledge or not. In other words, this study investigated the effect of advance organizers on improving collocational knowledge of Iranian EFL learners in a MALL-oriented classroom environment. To accomplish this aim, a quasi-experimental method of research, using a pretest-posttest design with a control group was employed in order to answer the research question. After the homogenization procedure the participants were divided into two groups of control and experimental. In order to investigate the effectiveness of the treatment and also compare the two proficiency levels regarding the treatment, two teacher-made multiple-choice grammar tests were employed as the pre- and post-test. The findings, guided by descriptive and inferential statistics, highlighted that advance organizers in a MALL-oriented classroom had a positive effect on improving EFL learners’ collocational knowledge. پرونده مقاله