Improving Student Learning Outcomes Main Subjects of Transformation Through Cooperative Learning Type STAD Class IX.1 Students of SMPN 1 Sawahlunto TP 2021/2022

Abstract- Creating effective and fun learning is the duty and responsibility of the teacher in overcoming students' learning difficulties in understanding and mastering mathematical concepts. The purpose of this study is to improve student learning outcomes for the subject of Transformation through cooperative learning of the STAD (Student Team Achievement Division) type in class IX.1 students of SMP Negeri 1 Sawahlunto in the 2021/2022 academic year. Based on the data analysis, the implementation of the action in the first cycle showed that the class average was 68.85. and the percentage of classical completeness is 42.31%. This result has not reached the classical completeness of 65% or more. As for the results of the observation of student learning activities in the first cycle, it was obtained that the average score of student learning activities with a total score of 52.29 (C) was included in the less active category. Likewise with the teacher's performance observation with a score of 68.75 (C), so that the results of the research in the first cycle showed that student learning achievement was still lacking and student learning activities were also still low. Because learning mastery in cycle I has not been achieved, then the implementation of the action is continued to cycle II by making improvements and improvements to the shortcomings of cooperative learning in cycle I. After making improvements in the learning process, from the results of the analysis in cycle II, the average value is obtained. class is 78.00 and the percentage of classical completeness is 80.77%. On the results of observations of student learning activities obtained a score of 62.02 (B) which is classified as active, and the teacher's performance score is 73.96 (B). This data shows that there is an increase in the average score on student activities and an increase in student achievement scores when compared to the previous cycle. And after being analyzed using classical completeness and average scores, student learning achievement in cycle II has increased significantly.