Abstract
This study examined the effects of problem-solving instructional strategy on Senior Secondary School students’ attitude towards Mathematics in Ondo, Nigeria. The target population for the study was Senior Secondary Two (SS II) students in Ondo, Nigeria. Purposive sampling technique was employed to select 173 SS II students for the study. A quasi-experimental, non-randomized, non-equivalent, pre-test, post-test control group involving a 2 x 3 factorial design was employed for the study. The dependent variable was students’ attitude to Mathematics. The independent variables were the problem-solving instructional strategy and the scoring levels. The test scores were analyzed using mean scores, standard deviations, t-test and Analysis of variance on the two null hypotheses formulated. An alpha level of 0.05 was used to determine the significant level. Findings from this study showed that the experimental group significantly performed better in Mathematics than the control group. Based on this finding, it is recommended among others that teachers of Mathematics should adopt the use of problem-solving instructional strategy in teaching Mathematics at all levels of education.