Haimbangu, M., and M. Chirimbana. “Practices That Help Grade 11 and 12 Learners to Improve Their Performance in Physics and Chemistry: A Case of Omusati Region, Namibia”. Namibia Educational Reform Forum Journal, vol. 29, no. 1, June 2024, pp. 58-79, https://journals.nied.edu.na/index.php/nerfj/article/view/89.