THE DOUBLE-EDGED SWORD: CALCULATOR ACCESS, STUDENT PERFORMANCE, AND THE ILLUSION OF COMPETENCE IN NIGERIAN SECONDARY MATHEMATICS. International Nexus Multidisciplinary Research Journal, [S. l.], v. 3, n. 1, p. 24–46, 2026. DOI: 10.65360/bzr5f107. Disponível em: https://inmrj.org/index.php/nexus/article/view/75. Acesso em: 23 feb. 2026.