Collaborative learning is one of the modern means, and it is considered one of the modern teaching methods after the old methods and teaching methods were unable to provide assistance to both the teacher and the student at the same time. Cooperative learning is a modern method of learning that departs in its style from traditional methods, such as board and chalk, as it uses the method of sharing between Students in the discussion sit in a circle, and each student presents his ideas and a view to everyone so that everyone can benefit from each other in thinking and reaching solutions. A point of view for everyone so that everyone benefits from the other in thinking and reaching solutions. The reasons for using cooperative learning and its application in our classes lie to the importance and benefits that cooperative learning achieves in achieving the best learning in the shortest way and can be summarized in the research .In the first chapter, the research touched on the importance of cooperative learning and its compatibility with the learning requirements of both parties of the student, as well as the teacher and its definitions and goals. As for the second chapter, it touched on the benefits of cooperative learning, as well as its characteristics and types, the reasons for cooperative learning, the conditions for cooperative learning as well as the principles and foundations of cooperative learning, and the researcher talked about the method of cooperative learning and emphasized the reasons for wasting opportunities to benefit from the work force of groups in schools and stressed the search for the extent to which It makes cooperative work a successful work and what are its elements, and the research emphasized the opportunities for learning that are unique to cooperative learning, and the difference between cooperative learning and teamwork, And its multiple forms and types and the role of the teacher in cooperative learning and the difference between modern cooperative learning and old cooperative learning. As for the research sample, it consisted of middle and second grade middle school students in the Tigris secondary school for girls affiliated to the General Directorate of Education in Baghdad / Karkh first from the Ghazaliya region and the school was chosen from several schools and choosing Three people from the second and third grades are average out of five people. As for the research tool, a test has been prepared that aims to measure the achievement of second-grade students in the mathematics subject after applying the independent variables in the three groups. After that, the levels measured by this test were determined by Bloom levels [knowledge - understanding - application] and the absence of tests It is codified in this reliable field. The researcher prepared a test for this purpose. In order to investigate the validity of the test, the researcher used A. Al-Dhahri B The content is sincere, and paragraphs were formulated with (50) test items and tested from the type of test multiple and this type of tests is characterized by a very difficult in the construction is very important, but it reduces the chances of guessing that there are four alternatives, three of which are wrong and only one right alternative. Therefore, the research objectives are: The main objective of this study is to know the effect of cooperative learning as a modern method of teaching and its role in students' interaction and raising their achievements in the classroom to serve the educational science.