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"Need a pentagonal pyramid that's six inches tall? Or a number line that goes from ‑18 to 32 by 5's? Or a set of pattern blocks where all shapes have one-inch sides? You can create all those things and more with the Dynamic Paper tool. Place the images you want, then export it as a PDF activity sheet for your students or as a JPEG image for use in other applications or on the web."

National Council of Teachers of Mathematics page, with lessons, activities, and more.

Online archive of images and film footage illuminating more than 200 years of American history.

The Wolfram Demonstrations Project is an open-code resource that uses dynamic computation to illuminate concepts in science, technology, mathematics, art, finance, and a remarkable range of other fields. Its daily-growing collection of interactive illustr

Mathematics illuminates the patterns that abound in our world. The Museum of Mathematics strives to enhance public understanding and perception of mathematics. Its dynamic exhibits and programs will stimulate inquiry, spark curiosity, and reveal the wonders of mathematics. The museum's activities will lead a broad and diverse audience to understand the evolving, creative, human, and aesthetic nature of mathematics.

"After Okta hides some bubbles under a shell, he then either adds more bubbles or takes some away. Students have to determine how many bubbles are left under the shell."

essentially a meta site that gathers links to the "most intelligent, provocative, and illuminating news stories, critical reviews, political essays, and commentaries published online." Updated six days a week, the site is divided into three main areas. "Articles of Note," "New Books," and "Essays and Opinion."