This study investigated the impact of a problem-posing intervention on students who had been ascertained through psychometric testing as above average in their mathematical aptitude but below average in their problem-solving skills. The study uses both quantitative and qualitative methods to investigate the nature of changes that resulted following an eight -week teaching experiment. Findings of this study provide positive evidence to suggest that problem-posing is a useful activity in the quest for improved problem-solving competence, particularly in a student's ability to explain how they solved problems. In addition, the data collected provided evidence to suggest that student's attitudes towards solving problems can be greatly enhanced by a problem-posing intervention.