It would be viewed that the knowledge couldn’t be directly transferred to the others. So, the lecture wasn’t successful in learning and teaching. Since both of communication and gesture were important in learning meaningfully. Furthermore, the communication could complete the gap of speaking. But, it was surprising that there was very little number of research studies regarding to gestures in learning and teaching area. But, in classroom using process of Lesson Study and Open Approach at the Center for Research in Mathematics Education, Faculty of Education, Khon Kaen University, were used in classroom, providing opportunity for students to learn based on their own potentiality. Therefore, the researcher was interested in surveying the mathematics communication by students’ gestures un- der context of Lesson Study and Open Approach context.