A Comparison of the effectiveness of cooperative and individual teaching methods on educational achievement of English in grade one of high school

The purpose of this study was to compare cooperative teaching and individual teaching on educational achievement in English in grade one of high school (female students). This study is a quasi-experimental study with pre-test- and post- test with two experimental groups. The Statistical population was high school's first grade female students of Mahabad. For sampling, multi-stage cluster sampling was used. The sample size was 52 consist of 25 and 27 members in the experimental group (1) and (2) in which cooperation and individual teaching methods were used respectively. In order to equalize the members of groups the student's GPA were controlled and pre-test and IQ test were done. The results showed no significant difference between groups.The pre-test was a researcher-made. Reliability of the pre-test was obtained 0.83. The cooperative and individual methods were done for 2 months and then post- test was carried out. The results showed no significant differences between them. T-test analyzes shows significant differences between the two groups so that the first experimental group (cooperative) showed better performance in educational achievement