Interactive Differential Equations (IDE) is specifically and pedagogically designed for students taking a differential equations course. It is remarkably easy to use and focuses on helping students visualize the mathematics. It is a CD-ROM containing more than 90 interactive differential equations tools and a workbook with labs and exercises to be used with the tools. It covers the entire, second-order differential differential equations course: first-order differential equations equations, linear and nonlinear applications, Laplace Transforms, series solutions, and boundary value problems. Applications are drawn from engineering, physics, chemistry, and biology.