Instructional materials such as charts and pictures are important in the teaching and learning of mathematics. This is because they help students to visualize the concepts that are being taught. In other words, they help to remove abstract nature of some concepts and make lessons learnt to be permanent. A quasi- experimental research design was adopted. Therefore, this study investigated the effect of instructional charts and pictures on students' academic achievement in Pythagoras rules in Abuja. Two research questions were answered and two null hypotheses were tested at 0.05 level of significance. A sample of 105 junior secondary two (JSS2) participated in the study. The instrument for data collection was Mathematics Achievement Test which contained 20 objective test items validated by specialists in mathematics and measurement and evaluation. The reliability index of the instrument established using Kuder Richardson 20 was 0.76. The results of the study showed that charts and pictures have significant effects on the academic achievement of students in mathematics in Abuja. It was therefore recommended among others that training, seminars and workshops should constantly be organized for mathematics teachers on the appropriate use of instructional materials for effective teaching and learning.
Olajumoke. et al. (Thu,) studied this question.