| Participants | Thailand | The United States |
| Context of the school | This school is a suburban school and participated in Lesson Study project since 2007 | These 4 schools are urban school which students are low median income and high poverty |
| Grade level of a lesson study team | a first grade lesson study team | a first grade lesson study team |
| A lesson study team’ s members | 1) a school principal who takes a leadership of implementing Lesson Study in this school. He is a leader of the reflection | 1) 6 first grade teachers from 4 schools who have 10 - 27 years teaching experiences and participated in the project for 4 years |
| 2) a first grade teacher who has 20 years teaching experience and participated in the project for 4 years | 2) an experienced educator who has more than 30 years teaching experience and participated in the project for 4 years. | |
| 3) a seventh grade teacher who take a role as an observer for first grade classroom and participated in the project for 4 years |
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| 4) a school coordinator who is a doctoral student of Mathematics Education program, Faculty of Education, Khon Kaen University. She participated in this lesson study team for 3 years |
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| 5) a student teacher who taught mathematics for first grade and participated in this lesson study team for a whole year. |
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