Aletan, M. S. . and Kuku, O. O. . (2017) “Effectiveness of frequency of testing on anxiety and achievement in mathematics among secondary school students in Ogun state, Nigeria: Effectiveness of frequency of testing on anxiety and achievement in mathematics among secondary school students in Ogun state, Nigeria”, Ghana Journal of Education: Issues and Practice (GJE), 3, pp. 15–35. doi: 10.47963/gje.v3i.486.