blogs, comment, criticism
essential maths…
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Wolfram resources
Wolfram|Alpha
E Weisstein
MathWorld
ScienceWorld
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cut-the-knot (A Bogomolny)
manifesto
math glossary
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Euclid's Elements (D Joyce)
Joyce's short course in trig
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archives.math.utk.edu
mathpages.com
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maths.mcs.st-andrews.ac.uk
British Society for the History of Maths
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math forum@drexel
Dr. Math
links table
faq & classic probs.
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MathsNet.net - AS/A2, algebra, GCSE, geometry,...
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Math2.org (resources)
mathcentre - guides, tutorials, exercises,...
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Math is Fun: K-12 tutorials, activiies, *calculators*,...
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nrich.maths.org
plus magazine
The Aperiodical
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Mathwords: Terms and Formulas from Algebra I to Calculus
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MATH-abundance (scarlet.be/~ping-tutorials & links)
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"Just The Maths" (AJ Hobson - pdf files)
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pballew.net - resources, lessons, ...
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Dr. J Calvert Page
Ken Ward's Maths Pages
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Platonic Realms / mathacademy.com (PRIME)
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CIMT- Centre for Innovation in Mathematics Teaching
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Center for Technology and Teacher Education, U. of VA
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Circumscribed circle theorem
Crop Circles
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Euclid's Elements (Thomas L. Heath, Ed.)
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MSWLogo: educational programming language
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Polygon Properties
Quadrilaterals - Learn.co.uk
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QuickMath Automatic Math Solutions
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S.O.S. Math
PlanetMath
@github
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Webmath.com- problems & solutions
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Newton BBS (ask a scientist archives...)
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Vatican Exhibit Main Hall
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Xah Lee's home page
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National Curve Bank
EqWorld - The World of Mathematical Equations
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whyslopes.com
Jim Loy's Mathematics Page
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Numericana.com
π in the Sky - high school maths magazine