STUDY THE IMPACT OF TEACHER EFFECTIVENESS AND ONLINE LEARNING FOR MATHEMATICS ACHIEVEMENT IN HIGHER SECONDARY LEVEL STUDENTS. Journal of Research Administration, [S. l.], v. 5, n. 2, p. 1997–2016, 2023. Disponível em: https://journlra.org/index.php/jra/article/view/401.. Acesso em: 9 apr. 2025.