Peningkatan Hasil Belajar Matematika Denganmetode Kerja Kelompok pada Kelas VI Sdn 02 Sempayuk

: According to the writer's observation in class VI Elementary School 02 Sempayuk this, most have difficulty reaching KKM in mathematics. This is because learning is not attractive, so that student learning outcomes are not as expected. The purpose of this study is to find out about student learning outcomes in mathematics lesson on area of ??a circle. After learning implemented using group work on the material flat area and perimeter of a circle wake obtained the following results: ( 1 ) the student was involved actively in the learning from the first cycle up to the third cycle, (2 ) increasing student learning outcomes that students' mastery of the material concept learning ie starting from the first cycle up to the third cycle the average value increased student . In the first cycle obtained results are not maximized . The percentage reached 69.44 % mastery learning. In the second cycle after some reflection and planning mastery learning gained by 80.56 %. and the third cycle (88.89 %).From this study we concluded that the use of environmental media student learning outcomes Elementary School fourth grade Sempayuk 02 Academic Year 2013/2014 can be improved. Finally, researchers suggested to the teacher to be able to use the method for group work in class lessons