This study assessed the Effect of Instructional Material on Multiplicative Thinking of Primary School pupils in mathematics in Kaduna State, Nigeria. The pre-test, post-test quasi experimental research design involving two groups (one experimental and the other control) was used. Ninety (90) pupils participated as sample for the study (48 male and 42 female). One instrument: Multiplicative Thinking Performance Test (MTPT) was used for data collection. The hypotheses were analyzed using the t-test at P≤0.05 level of significance. The results showed a significant difference in performance in favor of the experimental group. In addition, the result revealed no significant difference in performance of male and female pupils when exposed to instructional materials. Based on the findings recommendations were made such as: teachers should use instructional material in the teaching of multiplication to pupils to enhance pupils’ Multiplicative thinking skill and general performance in mathematics. Finally, workshops and seminars for mathematics teachers should be organized by the Ministry of Education and the State Universal Basic Education Board for each LGEA Kaduna State on the use of instructional materials to teach multiplication.
Keywords: Instructional Materials, Performance, Multiplicative thinking.
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