Pengaruh Brain Gym terhadap Konsentrasi Belajar Siswa Kelas XI IPA dalam Pembelajaran Matematika di SMA XYZ Tangerang UNIVERSITAS PELITA HARAPAN 39 Pengaruh Brain Gym terhadap Konsentrasi Belajar Siswa Kelas XI IPA dalam Pembelajaran Matematika di SMA XYZ Tangerang Tica Chyquitita Sekolah Lentera Harapan Toraja, Toraja, Sulawesi Selatan tchyquitita@gmail.com Yonathan Winardi Fakultas Ilmu Pendidikan, Universitas Pelita Harapan, Tangerang, Banten yonathan.winardi@uph.edu Dylmoon Hidayat Fakultas Ilmu Pendidikan, Universitas Pelita Harapan, Tangerang, Banten dylmoon.hidayat@uph.edu Abstract Math is considered to be one of the difficult subjects that makes it difficult for students to concentrate during the learning process because their brains become tired and tense. One of the popular and trusted ways to increase learning concentration is by using a ďƌaiŶ gLJŵ appƌoaĐh. Theƌefoƌe, the ƌeseaƌĐheƌs ǁaŶted to see ǁhetheƌ the ďƌaiŶ gLJŵ appƌoaĐh Đould iŵpƌoǀe leaƌŶiŶg concentration. The research used a quasi-experimental post-test only control group design. The population was the students of class XI Science Basic General Math A and B, while the sample was 15 students from XI science B as the control group and 15 students from XI Science B as the experimental group. Using the Mann- Whitney U-test with an alpha level of 0.05 indicated the asymptote Sig of 0.001 <0.05. This means that the concentration of learning in the experimental group was lower than that of the control group so it is ĐoŶĐluded that the ďƌaiŶ gLJŵ appƌoaĐh did Ŷot significantly affect studeŶts ĐoŶĐeŶtƌatioŶ of the studeŶts iŶ Đlass XI Science in learning Math. Keywords: brain gym, learning concentration, class XI science, quasi-experimental