http://swrc.ontoware.org/ontology#Misc The content of teachers' reflection in lessson study: a case study en Lesson study Reflection Primary school teacher Mathematics Saw Fen Tan Chap Sam Lim Teacher education This study aimed to explore the content and the level of teachers' reflection as they engage in lesson study (LS). Two LS groups participated in this study. However, this paper only discussed the content of the teachers' reflection from one LS group. This group comprised of six primary mathematics teachers. They carried out five LS cycles. Each cycle comprised of four steps, namely; (1) identify and formulate goals; (2) plan lesson plan collaboratively; (3) teach/observe the research lesson; and (4) reflect/refine lesson plan. The researchers participated in all the cycles to guide and to observe the participants. Electronic Paper presented at the 3rd International Conference on Teacher Learning and Development Conference (2016 ; Penang, Malaysia) Wawasan Open University