 Test and Worksheet Generators for Math Teachers  Kuta Software
Free printable prealgebra and algebra worksheets in PDF format with answer keys provided; free trials of the worksheet generator software. Purchase online. Windowsbased.
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 Test Banks  Ask Away Ltd.
Data banks of test questions prepared by classroom teachers for use in assorted disciplines in Canada and the U.S., including mathematics grades 7, 8, and 9. Sample questions are available on the site.
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 Test Dates  Graduate Educational Information Service
Dates and practice questions for major standardized tests, including the ACT exam, SAT test, Graduate Record Examination (GRE), and employment tests such as the Massachusetts Tests for Education Licensure (MTEL), the New York State Teacher Certification
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 Testing and Measurement: Articles and Research  Carolyn K., Hoagies' Gifted Education Page
Articles and reports on assessment and measurement, and also underachievement, in the context of the education of gifted children.
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 Testing Applets  Philippe B. Laval, Kennesaw State University
Applets categorized into regression, linear functions, quadratic functions, exponential functions, trigonometric functions, differentiation, integration, and graphing and other applets.
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 Testing Subsets Using Prime Numbers  Ian Clarke
Algorithm for subset testing which assigns a prime number to each element of the set and multiplies the primes. With descriptions of and comparisons to two other algorithms.
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 TestPrep Mathematics Table of Contents  Pamela Cohen, Walter Antoniotti
Free practice problems worksheets in whole numbers; fractions; decimals, ratios, rates, proportions, and percentages; exponents, roots, algebra, and geometry; using formulas to solve problems; multistep word problems; and graphs, signed numbers, statistics,
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 Test Prep Review  Testprepreview.com
As the title of this site indicates, there are materials to help users review in preparation to take a variety of tests, including the GRE, SAT, ACT, and Praxis. Under each of the free practice test areas, there are selfassessment modules with a set
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 TestTubeGames  Andy Hall
Apps, Flash games, and simulations by "an escaped physics grad turned educator.... following his dream to make abstract physics concrete. And draw dinosaurs." Explore special relativity with Velocity Raptor, orbits and chaos with Gravity Sim, particle
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 TeX2HTML  Curtis, Housken; WebPrimitives
A conversion utility that translates .tex files into .html files without converting typeset mathematics to GIFs. TeX2HTML converts typeset mathematics into HTMLbased layout commands, calling on the SYMBOL font resident on all computers, to provide for
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 Texas Instruments Syllabus Support Offer  Texas Instruments, Inc. (TI)
Texas Instruments wants to add greater impact to your curriculum and lessons. Let them know in what courses you are using TI technology, and they will send you support materials to help integrate it into your classroom: a TINspire™ support packet, TI
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 T_{E}X THE WORLD  Avital Oliver
This addon to the FireFox browser takes TeX typesetting on any website and renders it as an image. TEX THE WORLD runs every 3 seconds on interactive websites, so it marks up chat sessions as well as HTMLenabled webmail, embedding symbols on the fly
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 Texture and Colour  Paul Bourke
In many texturing applications it is necessary to be able to "tile" the texture over a larger region than the texture segment covers. Bourke offers a discussion with examples of tiling formats, together with links to tiles: Tile; Brick, Tile; Stone tile;
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 Tágoras  Luis Roche
Colección de ejercicios de matemáticas resueltos con detalle de principio a fin para alumnos y alumnas de Secundaria, Bachillerato y Ciclos. Temas incluyen derivadas, estadística, inecuaciones, límite de funciones, operaciones,
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 Theatrix (SWMC)
Sanctuary Woods Multimedia Corporation has joined with Theatrix Interactive to provide educational digital media experiences for kids. Currently offers Shockwave games, CDRom educational programs, and contests. CDRoms work with both Windows and Macs;
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 TheBestSoftware.com
Free trial version of a shareware scientific calculator, with a "printed" tape that you can edit.
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 TheGeometryTeacher  Andrew Shauver
Shauver, who teaches at a Michigan public high school in a onetoone laptop program, blogs to "describe his own independent learning and to reinspire the natural curiosity sometimes absent from the typical high school classroom." Posts, which date back
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 T.H.E. Journal Educational Technology Conferences  T.H.E. Journal
Search and browse educational technology conferences based on location, target audience, attendees by job responsibility, and conference size. Also link directly to the conference site and send email to the conference managers.
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 TheMathPage: An Approach to Calculus  Lawrence Spector; Borough of Manhattan Community College, CUNY
An introduction to real numbers, including such topics as: continuous versus discrete; limits; continuous functions; the "limit" infinity (?); the derivative; the chain rule; velocity and rates of change; maximum and minimum values; derivatives of trigonometric
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 TheMathPage: Plane Geometry  Lawrence Spector; Borough of Manhattan Community College, CUNY
A complete course based on Book I of Euclid's Elements, culminating in the Pythagorean theorem. Includes questions for checking understanding, with solutions.
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 TheMathPage: Topics in Precalculus  Lawrence Spector; Borough of Manhattan Community College, CUNY
Topics in precalculus include the formal rules of algebra; rational and irrational numbers; functions and functional notation; graphs; the vocabulary and roots (zeros) of polynomial functions; completing the square; the factor theorem and integer root
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 TheMathPage: Topics in Trigonometry  Lawrence Spector; Borough of Manhattan Community College, CUNY
Trigonometry from the very beginning, for anyone who needs help or a review of trigonometry. Topics include: Ratio and Proportion; Radicals: Rational and Irrational Numbers; The Pythagorean Theorem; The Definitions of the Trigonometric Functions (Ratios);
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 themathprof.com
In this cyber classroom, using animated, talking characters, Prof. Martin Weissman and his student discuss topics in Algebra. Includes a practice problem session. Internet Explorer and other software downloads required.
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 TheMathWebSite.com: aMath Teacher's Best Friend  TheMathWebSite.com
Provides high school math lesson examples, quizzes and tests complete with solution steps and final answers. Primarily for use as printable class sheets. Requires Internet Explorer, frames, Java, and JavaScript.
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 The Theorem of Pythagoras  Project MATHEMATICS!, California Institute of Technology
A videotapeandworkbook module that explores a basic topic in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. Several animated proofs of the Pythagorean theorem are presented, with applications to reallife problems
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 Theorem of the Day  Robin Whitty, London South Bank University
Every day, Whitty posts a PDF of a different theorem, lemma, law, formula, or identity  each "as selfcontained as possible." With pictorial interpretation; proof; glossary briefly explaining some parts of the mathematical language; references to related
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 Theoretical and Numerical Approach to "Magic Angle" of Stone Skipping  Shinichiro Nagahiro and Yoshinori Hayakawa, Department of Physics, Tohoku University, Japan
As published in the American Physical Society's Physical Review Letters: Nagahiro and Hayakawa "... investigate the condition for the bounce of circular disks which obliquely impacts on the fluid surface. An experiment [C. Clanet, F. Hersen, and L. Bocquet,
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 Theory of Tieknots  Yong Mao
The mathematical theory behind tying a necktie, with illustrations of the Four in Hand, the Pratt Knot, the HalfWindsor, and the FullWindsor, and a classification of necktie knots with respect to size and shape. Tying a tie knot is equivalent to a persistent
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 There are trisectable angles that are not constructible  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Why certain angles that are trisectable cannot be constructed by traditional methods.
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 There exist triangular numbers that are also square  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Inspired by a message sent in by Chris Whitrow, this page enumerates the set of infinite numbers that are concurrently triangular and square, and defines a recurrence relation for generating them.
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 These are Times that Try Mathematicians' Souls  David Brooks
Spurred by the Unabomber arrest, David Brooks, Science Editor, says it's time to stand on our desktops and shout to the world: "Say it out loud, I like math and I'm proud!" Previously published in The Telegraph (Nashua, NH).
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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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 A Thing In Common  Cut the Knot!, Alexander Bogomolny
Two applets, both of which use the Pythagorean theorem: a puzzle (Draw an {N/D} star polygon  a polygon whose N vertices are uniformly distributed on a circle, but each vertex is connected to its Dth neighbor. Regular polygons correspond to D = 1, and
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 Things I Made From Yarn  Alan Eliasen
Futureboy's online calculators include a blackjack strategy table, a model solar system calculator (create your own model solar system of any scale), a sun locator (find current position of the sun), a historical currency converter (find out "how much
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 Things Impossible  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Essays on impossible things, including trisecting an angle, doubling a cube, squaring a circle, moving pegs five places in one direction (via checkerjumps), finding the center of a given circle with the straightedge alone, representing the square root
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 Think & Derive  Chris Long
Monthly mathematical columns from May 1994 through April 1996 written for Central New Jersey Mensa's Forvm. Problems and puzzles, many with solutions.
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 Thinkfinity  Verizon Foundation
Browse lesson plans by state or search them for keywords. Educational resources developed by Thinkfinity or by partners such as NCTM include interactive games, news, videos, webinars, worksheets, and calendars of birthdays and biographies.
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 ThinkFun  ThinkFun, Inc.
The makers of Spin Out and Rush Hour seek to "push [you] farther, probe deeper and think more creatively through game play." Brainteaser games include Math Dice, which challenges you to use addition, subtraction, multiplication, division, and exponents
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 Thinking Mathematics!  James Tanton
Tanton writes wordless volumes of creative and surprising math puzzles, accessible approaches to calculus suitable for standardized test preparation, and curriculum "tidbits." Download his free guides to fractions and "to everything quadratic," and watch
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 Think Maths  Matt Parker
This group of mathematics speakers visits schools to perform maths talks and workshops in the UK. Sessions present math in ways that "grab the attention of students and remind them that maths is something to be enjoyed." Free downloads include domino
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 ThinkNum  Gregory Ugwi
A webbased financial data analysis engine. Use regression, curve trades, and other quantitative trading algorithms from scipy, numpy, and similar open source libraries to analyze economic information from hundreds of sources ranging from the ADO National
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 ThinkQuest
An international contest designed to encourage students from different schools and different backgrounds to work together in teams toward creating valuable educational tools on the Internet while enhancing their ability to communicate and cooperate in
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 ThinkThankThunk  Shawn Cornally
Blog by an Iowa headmaster and teacher of science, technology, engineering, and math (STEM). See, in particular, Cornally's collection of posts on StandardsBased Grading (SBG) and ongoing series on Honors Calculus course lessons, titled "Calculus: A
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 ThinkWave.com
A free web community that provides secure internetbased communication for parents, students, and teachers: realtime information about attendance, assignments, grades, and school curriculum.
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 Third Apex to Fractovia  Juan Luis Martínez
Several galleries, each with up to 18 fractal images, and discussions on fractals as art. Also an uptodate list of freeware fractal generators, screen savers, and fractal music software, with links and reviews.
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 Third International Mathematics and Science Study (TIMSS)  Initial Findings  National Center for Education Statistics (NCES)
Highlights from TIMSS; videotape classroom study report and classroom study; responses; the Commissioner's speech; results at the fourth, eighth, and twelfthgrade levels; test items, an annotated TIMSS publication list, and more. See also the 1999
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 Third International Mathematics and Science Study (TIMSS)  Math Forum
The Math Forum's page of resources on the TIMSS study. Initial findings, NCTM response, and more.
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 This is MegaMathematics! (MegaMath)  Nancy Casey; Los Alamos National Laboratory
The frontier of mathematics is an exciting place, where mathematicians experiment and play with creative and imaginative ideas, many of them accessible to young children; others (infinity is a good example) whose profound mathematical importance is not
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 thnik again!  Jan Nordgreen
"Silly mathematical dialogues aimed to confuse." Nordgreen's daily blog of brain teasers and quotes dates back to November, 2007.
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 Thomas Harriot's manuscripts  MacTutor Math History Archives
Linked essay: Thomas Harriot died in 1621. He had published no mathematical or astronomical works during his lifetime, but he left his papers in reasonably good order and set out his wishes in his will that they should be properly edited and published.
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