The National Council of Teachers of Mathematics offers this page with resources for grade school students and instructors. Mostly comprised of lesson plans broken down into four ranges of grade levels, Illuminations has single and multi-day online exercises. The investigations are presented online for teachers to review, but the interactive, multimedia activities can also be downloaded for student...

It is at times very difficult to get children excited about math, but Math Cats (designed by Wendy Patti, a teacher) is an online archive of fun and informative activities that will help young people learn about a number of math topics, including geometry, arithmetic, and other topics. As one might expect, much of this is achieved by a number of virtual cats who explain various features of the...

A team at Utah State University has assembled this impressive collection of interactive, educational online Java applets. The tools are suited for students in kindergarten through twelfth grade. There are five main categories of applications, consisting of numbers and operations, algebra, geometry, measurement, and data analysis and probability. Each category has a number of applets that...

Teach R Kids Math is a Web site with a large assortment of interactive lessons that demonstrate basic mathematical concepts. The material ranges from basic counting for preschoolers to more advanced topics for elementary school students. Online worksheets help children practice multiplication and division, rounding, fractions, number sequences, and much more. Some of the activities are timed,...