Gapminder is a great tool for creating data visualizations. Gapminder gives users the ability to create graphs of hundreds of demographic and economic indicators. It provides a good way for visual learners to see data sets in a context that is significantly different from standard data sets. Gapminder has a page for educators on which they can find thematic animations, graphs, quizzes, model lessons, and a PDF guide to using Gapminder.
"This is beautiful, powerful, intuitive math that lives in your browser. Graph multiple functions in vivid color and watch them update as you type. Save your work to the cloud or share it with friends."
"Create your own worksheets to visualize, interact with and explore the amazing world of mathematics. MathDisk online is absolutely free for everyone."