1. Adedayo, W. K. (2010). Teacher Qualification and Specialization in Primary Education.Mathematical Association of Nigeria Workshop Manual for Prima, 2010.
2. Ajai, J. T. (2015). Gender differences in mathematics achievement and retention scores: a case of problem-based learning method. International journal of research in education and science (IJRES), 1(1), 45-50. Retrieved on the 14<sup>th</sup> Jan. 2016.
3. Akowonjo I. J. and Tudunkaya S. M. (2018) Impact of Jigsaw Learning Strategy on Performance in Algebra among Senior Secondary Schools Students in Zaria metropolis, Kaduna state, Nigeria. Abacus (Mathematics Education Series), Pg 18-27, Vol. 43, No 1.
4. Alio, B.C. & Okafor, P.C. (2018).Effects of Some Mathematical Games on Primary School Pupils’ Achievement and Interest in Mathematics in Anambra State.Journal of the Mathematical Association of Nigeria, ABACUS (Mathematics Education Series) (43) 1, 440-447.
5. Bichi, S.S. (2002). Effects of Problem Solving Strategy and Enriched Curriculum on Evaluation Concepts Among Secondary School Students. Unpublished Ph.D Thesis, Faculty of education, Ahmadu Bello University, Zaria.