• NASA - Electromagnetic Spectrum
• Hyperphysics - Electromagnetic Spectrum Calculator

For Math:

The most extensive math resource is Eric Weisstein's MathWorld

• Algebra Related Tutorials
• The Math.com Website
• Planet Math Website

For Calculus, there is Calculus.org.

For Physics:

Eric Weisstein's World of Physics - This website is very dense and contains some wonderful - as well as some advanced - topics in Physics.

Other Sites:

• Los Alamos National Laboratory's Periodic Table of the Elements
• NIST - Constants, Units and Uncertainty
• Hyperphysics
• Mars Academy - Newton's Law of Universal Gravitation
• Lenntech - Periodic Table
• Maths Chase - Math Games

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