Abstract
Abstract This study aims to determine the effect of Brain Based Learning on students’ mathematical communication ability viewed from creativities, in the thematic subjects of science physics - mathematics. The research was carried out at SDN Pantai Harapan Jaya 01, Muara Gembong District, using experimental research on treatment with a level 2 x 2 design. The results showed that:(1) the mathematical communication ability of students who are given brain-based learning treatment is higher than students who use expository, (2) there is an interaction of learning models with creativity on students’ mathematical communication ability, (3) students’ mathematical communication ability with brain-based learning are morehigher than expository, this is for students who have high creativity, and (4) there is no difference in mathematical communication ability with brain based learning and expository treatment between students who have low creativity.