DEOGRATIAS, E. USING A CROSSING METHOD AS AN ALTERNATIVE APPROACH FOR TEACHING SYSTEMS OF LINEAR EQUATIONS IN SECONDARY SCHOOLS. International Online Journal of Education and Teaching, [S. l.], v. 9, n. 2, p. 1022–1031, 2022. Disponível em: https://www.iojet.org/index.php/IOJET/article/view/1631. Acesso em: 9 jan. 2026.