Grade-Free Learning System as A Means of Creating a Psychologically Comfortable Educational Environment in the Class to Motivate a Child to Successful Learning Activities. Eurasian Research Bulletin , [S. l.], v. 14, p. 17–20, 2022. Disponível em: https://geniusjournals.org/index.php/erb/article/view/2540. Acesso em: 18 apr. 2026.