A computer-based calculus course consisting of a complete interactive electronic text combined with a rich set of well chosen real life problems. The easy access to powerful technology allows experimentation. In the lab or lassroom the environment allows a partnership between teacher and student with emphasis on student responsibility. Independent study is also possible. Online tutoring is available. The courseware comes on a CD which contains all of the lessons, some extra tools, and Adobe PDF files for printing selected parts of the lessons: Lessons in Growth, Accumulation and Approximation: Growth and Growth Rates, Calculation Tools, Races and Modelling, Accumulation Measurements, Integration Tools, Splines and Expansions, Convergence and Power Series.