Julio Enrique Duarte, Flavio Humberto Fernández-Morales, Maria Aidé Angarita-Velandia. 2009. “The Relationship Between Educational Material and the Teaching of Science and Technology”. Educación Y Educadores 11 (2). https://educacionyeducadores.unisabana.edu.co/index.php/eye/article/view/730.