Implementation of playful strategies to improve academic performance in mathematics among sixth-grade students at El Bosque School in the city of San José de Cúcuta. AFDH [Internet]. 2013 Oct. 31 [cited 2025 Oct. 16];5(1):119-26. Available from: https://ojs.unipamplona.edu.co/index.php/afdh/article/view/1694