Perlaza Díaz CP, Henao Ramírez VM. Class protocol as a guiding activity in teaching at the second grade of elementary school. Cienc. soc. educ. [Internet]. 2018 Feb. 12 [cited 2026 Jul. 18];6(11):71-92. Available from: https://revistas.udem.edu.co/index.php/Ciencias_Sociales/article/view/2315