Abstract:
This study aimed to investigate the impact of cooperative learning on the grammatical competence of intermediate EFL learners in Oman. This research was designed as a quasi-experimental study. The participants in the research were totally 70 female students from the intermediate stage (cycle 2) in Dhofar governorate. They were enrolled in  23 ^rd of July school, a public-school subordinate to the ministry of education in Salalah, Oman. The study included one control group and one experimental group. During the second term English classes, the experimental group was taught grammar through cooperative learning activities. In contrast, a control group was taught grammar through the ordinary method. Both groups experienced a 15-item grammar pre-post test before and after 8 weeks of treatment.  A t-test was used to analyse the data obtained.  The results showed that cooperative learning strategies can improve EFL grammar skills.  It's recommended that EFL teachers should use the cooperative learning strategies to improve learning the grammar skills.