DONGWI, B. L. Using the Van Hiele phases of instruction to design and implement a circle geometry teaching programme in a secondary school in Oshikoto region: A Namibian case study. The Namibia CPD Journal for Educators, [S. l.], p. 4–62, 2018. DOI: 10.32642/ncpdje.vi.1270. Disponível em: https://journals.unam.edu.na/index.php/NCPDJE/article/view/1270. Acesso em: 10 may. 2024.