"For those who still like pencil and paper, but also want to use technology in the classroom, try FluidMath. My students love to see a handwritten equation change to a graph with a table of values using only a swipe of the pen. Sliders and animations make the math come alive. FluidMath interprets implicit, explicit and parametric equations with ease. I highly recommend that you pick up your pen and give FluidMath a try." Susan Keeble, Mathematics Instructor, Phillips Exeter Academy, Exeter, NH.