 A B Cron Portal  Auston B. Cron
GeoGebra applets by a teacher who has taught high school and early college students since 1970, and uses his dynamic geometry animations and interactive sketches in his classes to teach angle sums; perimeters and areas of rectangles and squares; reference
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 Mathematics Dictionary & Glossary for Students  Gary Hadler
Thousands of mathematical terms defined, with crossreferencing and linking.
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 MathForAllGrades
Overviews, definitions, formulas, and worked examples, primarily in algebra.
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 Math Motivation  Michael Sakowski
Answers to the question "Where will I ever use algebra?" Examples of how "the process of learning higher mathematics provides valuable skills in deductive reasoning and symbolic reasoning, in addition to math skills used directly in science and engineering
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 A Set of Mathematical Equivoques  Ken Suman
An original collection of mathematical equivoques, puns, and wordplays
created to both amuse and to help students make mathematical connections
with literature, linguistics, the arts, philosophy, etc.
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 Stat Trek
Free, online tutorial covers basic statistics, probability, distributions, sampling, estimation, and hypothesis testing. Includes online calculators, sample problems with solutions, and glossary of statistical terms.
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 TheXorb  Jagan Deb
Online calculators for the slope and yintercept of linear equations; standard deviations; mean, mode, and range; the Pythagorean Theorem; and properties of geometric figures such as triangles, squares, circles (circumference given area; area given diameter;
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 Tutor Pace  Tutorpace Inc.
Online homework help tutoring. Free math resources include descriptions of and primers for prealgebra, algebra, geometry, trigonometry, statistics, and calculus. See also Tutor Pace's collections of formulas and interactive multiple choice worksheets.
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