Technology can help develop understanding of abstract mathematical concepts through visualisation and graphic representation. The teaching and learning of calculus can be challenging as it involves abstract and complex ideas. The purpose of this study was to investigate how students and teachers attempt to use TI-Nspire, the latest graphing calculator from Texas Instruments, in teaching and learning calculus. The study also explored the use of TI-Nspire technology and how it affected students' motivation, interest and self-confidence in mathematics. This study used qualitative techniques such as interview and observation for data collection. The participants of this study were three Form Five (Grade 11) students from a mixed ability classroom in a public secondary school. Results of the study indicated that TI-Nspire reinforces students' understanding of calculus concepts besides stimulating mathematical thinking. Students perceived that TI-Nspire had a positive effect on their mathematical knowledge and ability.