To find out how lesson studies and lesson study discussions are carried out as a part of training in the field of school, we analyzed questionnaires and actual lesson study discussions in science. Though lesson studies are carried out two or three times a year and they feel difficulties with lesson study discussions, in few schools the discussions are improved or devised. We showed that, in lesson study discussions, active exchange of opinions was made about "Learning method" and "teaching material," on which observers easily share opinion, but discussions to examine learning of "learner" f...