“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” (2023) Educación y Tecnologí­a, (15), pp. 55–67. Available at: http://revistas.umce.cl/index.php/edytec/article/view/1628 (Accessed: 5 July 2026).