While I realize that visual aids are nothing new to mathematics and educating people in it, I use a tool that I've found works very well in my learning math and that many may have not realized works so well. It's AdobeIllustrator.Illustratoris an excellent program for creating geometric figures including polygons, line segments, smooth curves, circles, and ellipses. You can easily annotate your work using text. Editing your work is easy, and you can move, resize, reflect, and rotate the objects you include in your drawing.

Right now I'm reviewing calculus, andIllustratoris very helpful in understanding limits. For instance, I can fill a circle with triangles to estimate the circle's area.

NowIllustratormight be a bit expensive for a lot of people and has a fair learning curve. If you think that may be a problem for you, then there are a lot of other good drawing programs on the market that may work much likeIllustratorbut are less expensive and may be easier to learn.

In any case, I've found that learning math visually this way is a real plus.