Enhancing Grade 1 Thai Students’ Learning about Mathematical Ideas on Addition Through Lesson Study and Open Approach. Mediterranean Journal of Social Sciences, [S. l.], v. 6, n. 2 S1, p. 28, 2015. Disponível em: https://www.richtmann.org/journal/index.php/mjss/article/view/5859.. Acesso em: 5 jan. 2025.