A free comprehensive math resource site. Find free worksheets, math ebooks for elementary grades, extensive link list of games, interactive tutorials & quizzes, curriculum guide, and math teaching help articles/lessons. The resources emphasize understanding of concepts instead of mechanical memorization of rules.
INTERACTIVES 3D Geometry Lesson
In these Lessons, you'll learn about some of the 3 D objects in our world. You'll learn some of the terminology used to describe them, how to calculate their surface area and volume, as well as a lot about their mathematical properties.
"The National Academy of Engineering (NAE), at the request of the National Science Foundation, convened a committee of leading technical thinkers to create a list of the grand challenges and opportunities for engineering facing those born at the dawn of this new century."
This list was generated for those teaching 3-12 year old students. It suggests FOSS for music composition, painting, space exploration, math, and more.