 Temple Circles  Ivars Peterson (MathTrek)
One tradition that flourished 200 years ago in Japan, during its period of isolation from the western world, involved Euclidean geometry. Scholars and others would inscribe geometric problems on wooden tablets, then hang the tablets under the eaves of
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 Ten Marks  Ten Marks
Intended as a program enabling students to practice and master math concepts through intelligent,
personalized worksheets, 3 minute videos, practice and hints, all at their own pace. This structured program is mapped to state standards for grades 3 through
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 TenMarks  TenMarks Education Inc.
View math curricula "albums" by grade and state, with hints and video instructions on demand. Teachers may monitor, assign, and review their students' work.
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 Tennessee Sports Math Project  Gary Keplinger
Sportsrelated activities for mathematics teachers in the sixth through ninth grade classrooms, with the goal of stimulatiing "atrisk" students. The site organizes problems by learning objectives or by sports activities, including baseball, football,
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 Tensegrity Structures  Paul Flavin
"Compression and Tension are good; Torque's a Killer. Plato, Fuller and the three little pigs." "Cubes (constructed with beams) and houses can and do collapse when a sufficient horizontal (shearing) force is applied above the foundation. The walls act
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 TERC (Testbed for Collaboration)
TERC, funded by the National Science Foundation, is a project that involves science classrooms around the world working together to design experiments, gather and share their data, and analyze the results. TERC's mission to improve math and science education
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 Teri Daniels Books  Teri Daniels
Daniels is the author of the picture book Math Man (Scholastic Books), an IRA/CBC Children's Choice selection. The site contains information on the book, enrichment activites related to the book, and a list of math picture books the author recommends.
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 Termesphere Gallery  Dick Termes
Spherical paintings that use a six point perspective. View images of the paintings and read about the artist. Products and services include workshops, lectures, books, and models of the Platonic solids, as well as the painted spheres.
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 Terrapin Software  Terrapin Software
Terrapin Logo sells Logo products and other educational software and Logo materials, such as Mission Control, Crystal Rain Forest, and Roamer World. Take a quick lesson in Logo programming; learn about robotics powered by Logo, such as Universal Robotics
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 Terry McConnell's Home Page  Terry McConnell, Mathematics Department, Syracuse University
Download PDFs of tests given in McConnell's introductory calculus, Math 295. "Stuff" ranges from a remark on average velocity and an expository paper showing the details of how to derive the second order correction to the period of a plane pendulum using
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 TerryStickels.com  Terry Stickels
Puzzle website by author and syndicated columnist Terry Stickels. Visual puzzles, slideshows, and an online store for books, games, and other materials.
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 Tessellated Polyhedra  Jill Britton
Fullpage printable nets of each of the regular polyhedra, decorated with individual surface tessellations in full color. A higherresolution blackandwhite version of each tessellated net appears in Polyhedra Pastimes, by Jill Britton, published by
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 Tessellation Database  Patrick Snels
Find tessellations by subject, author/artist or by plane geometry. A virtual tessellation museum is planned.
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 Tessellation Methods Using MS Paint  Diana Hunter
Lessons and examples in creating tessellations using MS Paint include stepbystep instructions on the translation method, glide method, rotation method, midpoint rotation, and right triangles. Hunter also provides suggestions for making better tessellations,
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 Tessellation  Roger Carthew
Sets of foam shapes for use in making tessellations. Site includes purchasing information, description of shapes and colors provided, and example tessellations.
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 Tessellations: An Application Of Simple Regular Polygons (SMILE)  Mary Racky, Kenwood School
A lesson designed to develop basic skills making and identifying homogeneous
tessellations, both regular and semiregular. From the Patterns and Logic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative
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 Tessellations, Lifelike Tilings...  Andrew Crompton
Tessellations, Lifelike Tilings, Grotesque Geometry, Dissection Puzzles, Anamorphic Mirrors, and Escher style drawings: about twenty examples of Crompton's own work as well as the world's first tessellation (not by Escher), by a teacher of geometry to
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 Tessellations.org  David Annal
Overview of the subject of tessellations with practical examples of how to produce them. Background information on tessellations, including symmetry and famous tessellators, and extensive galleries.
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 Tessellations Project  Mrs. Sulik's Fifth Grade Math Class
"M. C. Escher was a Dutch artist who lived from 18981971. Many of his drawings were tessellations. Instead of using the usual polygons, like triangles and squares to tessellate, he liked to create pictures of horses, fish, salamanders, and birds that
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 Tessellations  Robert Fathauer
A company that makes Puzzellations, Colorful Connectables, and Perpetual Patterns puzzles, plus a variety of other products inspired in part by the Dutch graphic artist M.C. Escher, but also by mathematicians such as Roger Penrose and Benoit Mandelbrot.
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 Tessellation Tutorials  Suzanne Alejandre
A series of tutorials that teach students how to tessellate (somewhat in the style of the art of M.C. Escher) using HyperCard for black and white and/or HyperStudio for color, ClarisWorks, LogoWriter, templates, or simple straightedge and compass. The
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 The Tesseract  Cut the Knot!, Alexander Bogomolny, with Don Greenwell
A hypercube is a multidimensional analogue of a 3dimensional cube in that each coordinate of a point in a hypercube is restricted to the same 1dimensional (line) segment. The Tesseract is a 4dimensional hypercube. With an applet designed to demonstrate
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 Tesseracts: Cubes Get Hyper (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
Madeleine L'Engle, who wrote A Wrinkle in Time, used tesseract to mean a shortcut through space and time. In her story, spacetime wrinkles, or folds onto itself, creating new paths that allow characters to tesser, or travel from one end of the galaxy
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 Tess  Pedagoguery Software
A shareware program for creating symmetric planar illustrations. With Tess, while you draw you can automatically maintain the symmetry group you have chosen; 11 rosette, all 7 frieze, and all 17 wallpaper groups are included. Illustrations may be printed
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 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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 Test Professor.com  Test Professor, Inc.
Test Professor offers online diagnostic tests, student assessments, tutorials, math help, testprep, and practice tests. Choose a country, province, or state to see its standards, objectives, targets, skills, department of education, and example problems
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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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 Tetrakys
Interlooping equilateral, isosceles, and scalene triangles for building two and threedimensional geometric objects, exploring area and volume, and visualizing fractions and arithmetic operations. The foam composition of these colorful manipulatives
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 Tewodros Amdeberhan's Electronic Headquarters
Tewodros Amdeberhan studies combinatorics, number theory, special functions, partial differential equations, computer algebra, algorithmic proof theory, and harmonic analysis. His articles on these topics, as well as some unpublished musings, are available
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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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 TeXaide  Design Science, Inc.
A free version of MathType's Equation Editor for Windows 95, 98, and NT that generates TeX using MathType 4's TeX translator technology. Whereas Equation Editor can be used with any application that supports OLE or can paste a graphic from the clipboard,
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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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 TeX, METAFONT, dvips, and Related Files  Stanford University
The files in subdirectories "dist" and "local" of this directory are master files for TeX and METAFONT, maintained personally by Donald E. Knuth. The dist/ directory contains the latest official sources for TeX, METAFONT, Computer Modern, and accompanying
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 Textbooks: Download Free Ebooks  Bookboon.com
Free ebooks for download, with advertisements approximately every third page. Site defaults to US or UK options; look for Calculus or Mathematics in the left sidebar for mathrelevant topics.
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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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 TeX to GIF converter for Web documents  John Walker
A simple Perl program that uses the same software tools as are employed by LaTeX2HTML to compile individual equations in short LaTeX files into GIF images suitable for embedding in Web documents.
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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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 TeX Users Group (TUG)
Founded in 1980 to provide leadership for users of TeX, Donald Knuth's revolutionary typesetting system, TUG represents the interests of TeX users worldwide. From this site you can find activities (calendar, TUGboat, TUG meetings, user groups, working
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 Thales' triangles  Joshua Bowman
Blog about "teaching and doing mathematics at a liberal arts college." Posts by this Smith College professor date back to July, 2006: "instability and control"; "the end of a good man's life" (on the death of mathematician Adrien Douady); "Klein's quartic
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 That Math Lady  Mandy Casto
Blog posts, which date back to August, 2012, have included "A Smartphone Becomes a Teacher's Best Friend," "Math Misconceptions Malady," "Circle Math Foldable," "Using Comics to Communicate," and "How: The Most Important Question in Math." See the library
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 ThatQuiz  Andrew Lyczak
Practice integer and fraction arithmetic, inequalities, averages, exponents, factors, algebra, calculus, shapes, probability, place value, graphs, sets, trigonometry, and more. The site times and scores performance. Register for online administration
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 That's Mathematics!  Nate Eldredge
A mathematician's collection of "various sparetime projects." Blog posts of "diversions, distractions, and math," which date back to June, 2012, focus on Mathgen, Eldredge's perl program that uses contextfree grammar, LaTeX, and BibTeX to randomly generate
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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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