MWANGI, S. W. Effects of Concretised Geometrical Models during Instructions on Secondary School Students’ Mathematics Achievement by Gender in Kibwezi Sub-county, Kenya. The International Journal of Humanities & Social Studies, [S. l.], v. 5, n. 6, 2017. Disponível em: https://internationaljournalcorner.com/index.php/theijhss/article/view/125419. Acesso em: 23 jul. 2024.