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***Art of Problem Solving: Math Articles**

A variety of topics about teaching and learning math. Also check out the AoPS Wiki.

**CSU Problems of the Week**

This link takes you to the main *Problem of the Week* puzzle. There is also an Algebra in Action puzzle and other puzzles for younger students.

**Cut the Knot Interactive**

“Mathematics Miscellany and Puzzles,” many of which require Java. One of my all-time
favorite sites.

**Free Online Graph Paper**

PDFs galore for any graphing project.

**Geometry**

Various notes, tidbits, equations, and diagrams—2D, 3D, and more. Scroll down for polyhedra,
including a link to build your own models.

**Hex-a-hop**

My all-time (so far) favorite logic game. “There is no time limit and no real-time
elements. The objective is simply to destroy all the green hexagonal tiles on each of the 100 levels. As you progress through
the game, more types of tiles are introduced which make things more difficult and interesting.” For all ages.

**How to Read Mathematics**

The title is self-explanatory.

**MathCaching**

Test yourself: How much of high school math do you remember? Solve mathematical problems
to find hidden “boxes” on the Internet. Each box reveals clues to the location of the next one. Levels range from
pre-algebra to trigonometry, with calculus under development.

**Mathematical Quotation Server**

I love quotations! No matter what I want to say, somebody else has probably already said
it better.

**Mathematically Correct**

Articles about the current U.S. “Math Wars” and reviews of many math textbooks.

**Mathematics Articles by Stan Brown**

Articles about how to succeed as a math student, how to use a graphing calculator, and other
topics from algebra, trig, calculus, and statistics.

**Number Gossip**

“Everything you always wanted to know about your favorite number, but were afraid to
ask.”

**NYC HOLD**

More articles about mathematics education and the “Math Wars.”

**Proofs without words**

I love these!

**Recreational Mathematics**

Part of Wolfram MathWorld: games, art, humor, and more.

**The Math Forum**

“The Math Forum is a leading center for mathematics and mathematics education on the
Internet.” Enough resources and links to get lost in.

**What’s Special About This Number?**

Distinctive facts about several numbers: 0-9999 the last time I looked.

**Wolfram MathWorld**

The best online reference I know for anything related to math.