The objectives of the research are as follows: (1) Increasing the mastery of the concept of decision-making relationship together by using props in the form of pictures and objects around. (2) Seeking student activeness information in Civics learning about the Unitary State of the Republic of Indonesia. (3) To describe the application of role playing method with cooperative Learning model to improve the learning result of decision making with fourth grade students of SD Negeri 179 Bengkulu Utara. Research using Classroom Action Research Method (CAR). This increase occurs in cycle I and cycle II with evidence of improvement in: (1) Using the media of learning culture and globe can improve students' understanding of the material of the Unitary State of the Republic of Indonesia. (2) Cooperative learning learning model through the application of role-playing method to by using visual aids can improve student learning outcomes. (3) The percentage of students' learning completeness has increased significantly after the improvement of learning on evaluation before improvement of learning there are 12 students or 52% of 23 students. On the improvement of learning cycle I increases, students who score 75 and above to 16 or 69% of the total 23 students and on improvement cycle II to 22 students or 96%.