National Science Foundation supported project to develop a library of web-based virtual manipulatives.
National Library of Virtual Manipulatives
Continue reading about National Library of Virtual Manipulatives
This site explains what Roman numerals are, how they work and also provides a Roman numeral converter.
Check it out here.
This is an awesome site. Their intro reads:
Currently the Calculators On-Line Centercontains over “23,265″ Calculators created by over “4,480″ very “CREATIVE” Individuals, Businesses & Tax Supported Entities World Wide
Obviously time and space won’t allow me to list all 23,265 of these, but here are a few we found fascinating at our house:
Chinese Number [...]
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S.O.S. MATHematics is your free resource for math review material from Algebra to Differential Equations!The perfect study site for high school, college students and adult learners. Get help to do your homework, refresh your memory, prepare for a test, ….Browse our more than 2,500 Math pages filled with short and easy-to-understand explanations. Click on one [...]
Lessons: “How do you really do this stuff?” — Purplemath’s algebra lessons are written with the student in mind. These lessons emphasize the practicalities rather than the technicalities, demonstrating dependable techniques, warning of likely “trick” questions, and pointing out common mistakes. The lessons are cross-referenced to help you find related material, and a “search” box [...]
Learn math at “Interactive Mathematics”, where the lessons are easy to
understand and easy to read. The site uses interactive documents so you can
learn while playing with the concepts. Topics range from Grade 8 algebra
through to Fourier series and Laplace Transform.
http://www.intmath.com/
