Math by Subject
K12 Topics
algebra
arithmetic
calculus
discrete math
geometry
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Advanced Topics
analysis
calculus
diff. equations
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discrete math
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geometry (adv.)
linear algebra
modern algebra
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Problems and Puzzles  Geometry
This list contains some of the best geometry problem and puzzle
sites. For a more exhaustive list, or to find materials that fit your
specific needs, search or browse Geometry or Problems
and Puzzles in the Forum's Internet Mathematics Library.
 A+ Math

A site developed to help elementary school students improve their math skills interactively, offering: educational math games (learn basic operations
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 AMOF: The Amazing Mathematical Object Factory
 Frank Ruskey

Combinatorial objects are everywhere. How many ways are there to make change for $1 using unlimited numbers of coins of all denominations? Each way is
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 Elementary Problem of the Week
 Math Forum

A project designed to challenge elementary students with nonroutine problems and to encourage them to verbalize their solutions. From 1995 to 2002,
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 Fibonacci Numbers and the Golden Section
 Ron Knott

Information about the Fibonacci series, including a brief biography of Fibonacci, the numerical properties of the series, and the ways it is
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 Geometry Problem of the Week
 Annie Fetter, the Math Forum

The Geometry Problem of the Week (PoW) is a regular feature of the Math Forum, providing students an opportunity to answer questions and receive
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 Interactive Mathematics Miscellany and Puzzles
 Alexander Bogomolny

"The peculiar beauty of Mathematics lies in deduction, in the dependency of one fact upon another. The less expected a dependency is, the simpler the
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 K12 Teaching Materials (Mathematics Archives)
 University of Tennessee, Knoxville (UTK)

An extensive list of Internet sites with significant collections of materials that can be used in the teaching of mathematics at the K12 level.
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 Kids' Place Brain Teasers
 Houghton Mifflin Company

Math puzzles for grades 34, 56, and 7+. You don't need to be a math whiz to solve them, just to be patient and find different ways of looking at
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 Magic Squares: Math, History, Geography
 Suzanne Alejandre

Designed primarily for middle school and older elementary school students, this Math Forum Web unit includes classroom activities for four different
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 Mathematical Games and Recreations
 MacTutor Math History Archives

Number games, geometrical puzzles, network problems and combinatorial problems by famous mathematicians, starting around 1850 B.C. and continuing on
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 Math for Morons Like Us
 ThinkQuest 1998

Students talk to students about math: a site designed to help you understand math concepts better. Tutorials, sample problems, and quizzes for
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 Monthly Themes
 NRICH Maths, Univ. of Cambridge

Past problems from the NRICH Online Maths Club, archived by month. Each problem has a symbol indicating the stage, which tells you how little or how
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 Problem Solving in Mathematics
 Jim Wilson; Univ. of Georgia

Problems in algebra, geometry, conversion, cryptarithm, "mean," trigonometry, and a mixture of all, many with comments and solutions, from a course
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 Tangrams
 Tom Scavo

Tangrams, a puzzle that helps develop spatialvisualization skills, may also be used to introduce or reinforce geometric concepts such as congruence,
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 For more, search or browse Geometry or Problems
and Puzzles in the Forum's Internet Mathematics Library.
