Roberts , Douglas A., and Graham W. F. Orpwood. “Classroom Events and Curricular Intentions: A Case Study in Science Education”. Canadian Journal of Education/Revue canadienne de l’éducation 7, no. 2 (January 1, 1982): 1–15. Accessed September 19, 2026. https://cje.journals.publicknowledgeproject.org/cje/index.php/cje-rce/article/view/8128.