Use of a mobile app as an alternative to learning fractional operations in high school students during the COVID-19 pandemic. Case: Industrial Technical High School No. 15. Educación y Tecnologí­a, [S. l.], n. 15, p. 55–67, 2023. Disponível em: http://revistas.umce.cl/index.php/edytec/article/view/1628. Acesso em: 5 jul. 2026.