Iranian Journal of Educational Sociology 2645-3460 8 پیاپی 8-3 2025 08 25 Proposing a Suitable Integrated Model of Cooperative Learning Styles and Its Impact on Academic Achievement and Mathematics Anxiety Among Ninth-Grade Students: A Mixed-Methods Study Proposing a Suitable Integrated Model of Cooperative Learning Styles and Its Impact on Academic Achievement and Mathematics Anxiety Among Ninth-Grade Students: A Mixed-Methods Study 1 14 10.61838/kman.ijes.8.3.10 EN Journal Article 2025 05 01 <p><strong>Purpose: </strong>This study aimed to evaluate the effectiveness of an integrated cooperative learning model in reducing mathematics anxiety and enhancing academic achievement among ninth-grade students.</p> <p><strong>Methods and Materials: </strong>A mixed-methods exploratory research design was employed. In the qualitative phase, a conceptual framework was developed by synthesizing cooperative learning strategies from existing literature and focus group interviews with educators. The final model incorporated multiple cooperative strategies, including the jigsaw method, problem-based learning, team games tournament, and peer teaching. In the quantitative phase, a quasi-experimental method with pretest-posttest and control group design was used. Sixty ninth-grade students from two mathematics classes in Tehran were randomly assigned to either the control group (traditional instruction) or the experimental group (integrated cooperative model). Mathematics anxiety was measured using a standardized questionnaire, and academic achievement was assessed through math tests. Data were analyzed using ANCOVA to control for pretest differences.</p> <p><strong>Findings: </strong>ANCOVA results indicated a significant effect of the integrated cooperative learning model on reducing mathematics anxiety, F(1, 57) = 83.449, p &lt; .001, with a large effect size (η² = 0.594). Additionally, a significant improvement in academic achievement was observed in the experimental group compared to the control group, F(1, 56) = 6.236, p &lt; .001, with a moderate effect size (η² = 0.100).</p> <p><strong>Conclusion: </strong>These findings support the use of structured, student-centered, and collaborative instructional methods as viable alternatives to traditional teaching, particularly in mathematics classrooms where anxiety and low achievement are prevalent.</p> https://www.qijes.com/index.php/ijes/article/download/1355/1376