This qualitative study attempted to determine the causes of poor performance among Grade 12 learners in tasks involving certain calculus tasks, especially in cubic graphs and application of differential calculus. The study was conducted in three schools of the Msukaligwa 1 Circuit in the Gert Sibande District, Mpumalanga Province in South Africa. Differential calculus is a branch of mathematics that is concerned mainly with the study of the rate of change of functions with respect to their variables especially through the use derivatives and differentials. Students have difficulties in learning and mastering this section of calculus as is revealed by examiners� and moderators� reports year after year. The purpose of this study was to investigate possible intervention strategies to improve on the poor performance by Grade 12 learners in calculus-based tasks, especially in cubic graphs and their application. Findings emanating from the data suggested that there are many possible interventions to address poor student performance in this area of mathematics

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