- 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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- Theatrix (SWMC)
Sanctuary Woods Multimedia Corporation has joined with Theatrix Interactive to provide educational digital media experiences for kids. Currently offers Shockwave games, CD-Rom educational programs, and contests. CD-Roms work with both Windows and Macs;
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- The-Best-Software.com
Free trial version of a shareware scientific calculator, with a "printed" tape that you can edit.
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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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- themathlab.com
Playful, interactive student-made problems, games, drills, lesson ideas, tools, "magic," and more. Lessons include practice problems which, when solved correctly, generate passwords that grant access to "treasure rooms." Lesson ideas include Algebachee
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- thenumbertwentyone - Courtney Steketee
Blog posts, which date back to August, 2012, have included "Math Misconceptions Malady," "Classroom Tour," "#made4math #3," "Scoring Scales," "Group Behavior Logs," "Classroom Management," "Translating Words into Math," "Graphing Inequalities Day 2,"
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- Theory Y Algebra - Ken Tilton
A private algebra training center complete with your own personal algebra coach
helping you "level up" through progressively more challenging skills. Theory Y Algebra draws on key elements of the Algebra I HomeworkTutor software of the 1990s, with substantial
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- There Is No Place Like SPACE - Sharon White
Junior high students explore living in space through this interdisciplinary (art, language arts, math, reading, social studies and science) project. Site contains a summary, scenario, student pages, and Internet links, as well as a list of standards addressed.
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- TheXorb - Jagan Deb
Online calculators for the slope and y-intercept 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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- 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 checker-jumps), finding the center of a given circle with the straightedge alone, representing the square root
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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 Blocks - Colleen King, Math Advantage Learning Center
Thinking Blocks teaches students to visualize and model math word problems. The program features interactive exercises, video instruction, and independent practice, all online.
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- Thinking Fountain - Science Museum of Minnesota
Thinking Fountain offers surprising and personal connections to science. It's a living card file full of ideas and activities. Includes the opportunity to add your own projects. See Shapes Cluster: Shapes & Math: Shape Walk, I C Shapes, Bubble Geometry,
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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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- 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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- ThinkWave.com
A free web community that provides secure internet-based communication for parents, students, and teachers: real-time information about attendance, assignments, grades, and school curriculum.
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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 twelfth-grade 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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- Thom's Fractals
A collection of fractal creations: images and wallpaper tiles, and links.
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- Thorleif's SOMA page - Thorleif Bundgard, Denmark
Over a thousand figures for these cubes: standard figures (176, all solved); McFarrens figure set (798, all possible); and more. An index of all figures is available. With some SOMA history and a link to a newsletter.
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- Thot / Nouvelles de la formation à distance - Denys Lamontagne, Directeur et Rédacteur en Chef
Une base de données de rubriques: cours, logiciels, références, technologies, didactique, arguments, actions, institutions, revue médias, et communiqués. Aussi, des forums animé et archivés.
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- Three Common Graphs - Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about three common graphs: bar graphs, histograms, and pictograms.
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- Three Dimensional Graphing Applet - James Goodenberger
A Java applet with which to graph first degree equations with three variables (planes) in three dimensions. The graph can be rotated and zoomed in or out of, but it won't graph a plane that passes through the origin.
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- Three for the Money: The Degree/Diameter Problem (MegaMath) - Nancy Casey; Los Alamos National Laboratory
Students can understand and work on an unsolved problem in mathematics. There is a good chance that this problem can be solved by someone who spends enough time experimenting with it. The only skills required to work on it are the ability to draw dots
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- Three Houses, Three Utilities - Math Forum, a Classic Problem from the Ask Dr. Math FAQ
You are to draw a line from each house to each utility, without the lines ever crossing. Can you connect the houses to the utilities?
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- Three Skills For Algebra - Alan Selby
This book describes three skills key to the algebraic way of writing and thinking, offering a first image of mathematics beyond arithmetic. It also describes the first elements of logic or rule-based reason, needed in all disciplines for writing or a
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- Through Mazes to Mathematics - Tony Phillips; Dept. of Mathematics, SUNY-Stony Brook
Material about a class of mazes that have a complete mathematical description. Includes building your own labyrinth, an activity suitable for 4th-graders and up. Explores the relationship between mazes and mathematics. Examples and calculations with Simple,
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- Through the Glass Wall: Computer Games for Mathematical Empowerment (TERC) - Testbed for Collaboration, Eisenhower Regional Consortia
An NSF-funded research project that has spent two years looking at how girls and boys play mathematical computer games in order to consider and describe what makes a good mathematical and equitable computer game. The site provides descriptions of over
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- TI-83 / TI-84 Games and Programs - Bill Paetzke
Bill Paetzke offers TI-83/TI-84 Plus programs to help students and teachers be more efficient in using their calculators. The programs are organized under these categories: Algebra, Finance, Geometry, Physics, Programs, Statistics, Trigonometry, and Tutorials.
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- Ti 84 Plus Calculator
Instructional videos include using the parametric function to construct a pentagram, hypothesis testing, sketching polynomial functions, finding critical points of a function, and using the TVM (Time Value of Money) Solver method. The site also offers
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- TI-85 Programs - John Lindsay Orr; Dept. of Mathematics & Statistics, Univ. of Nebraska-Lincoln
Integration programs include Riem (calculates a numerical value for the Riemann sum approximation of the definite integral of a function), Circumscribe (calculates an approximation of the definite integral of a function using circumscribed or inscribed
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- TI89Prog - Mickaël Nicotera
A French database of programs for the TI-89, TI-92+ and V200 graphing calculators, organized into categories such as math, games, ebooks, pictures, and cours prépa. With an online discussion forum, links to other resources, and more. Available
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- Tickling the Mind - Ivars Peterson (MathTrek)
... Different math teachers may use different styles and methods, and they may favor different topics. However, they all share the goal of building an appreciation of both the usefulness and the intellectual wonder of mathematics. Much of the current
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- TIC no ensino - Jorge Fernandes; Professor de Matemática, Lisbon, Portugal
Site dedicado à aplicação das TIC no ensino e, em particular, na Matemática. With many resources, and links to math sites in English and Portuguese.
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- Tides and Tide Prediction - Tony Phillips; Dept. of Mathematics, SUNY-Stony Brook
General information about tides and tide prediction: Priming/Lagging: a calculus with calculators exercise demonstrating the priming and lagging of the tides at Stony Brook. Samples of current tide predictions from the National Ocean Service. TideSounds:
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- Tiesforteachers
A company in the UK selling neckties specifically with the school curriculum in mind. The growing collection includes ties for teachers of maths, science, English, music, ICT and other general-purpose school subjects.
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- TI Graphing Educator Guide - Texas Instruments, Inc. (TI)
The educator’s guide to the benefits of using graphing calculators for classroom assignments and homework, including sections on research and what to say to parents.
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- TileDreams - ZayanteCreek Solutions
Explore geometry, color, symmetry, and design by creating mosaics, tessellations, mandalas, and other designs. View galleries and submit your own TileDreams designs; read the user manual and software reviews; and download a trial demo, or purchase a license
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- Tile.Net - List-Universe.com
A comprehensive Internet reference site for finding discussion lists (mailing lists); Usenet newsgroups; FTP sites; computer products and vendors; and Internet and Web design companies. Search mailing lists by keyword (algebra, calculus, etc.) to find
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- Tiling: A Java Program for Exploring Plane Tilings - Tom White
A Java application for experimenting with tilings and tessellations through scripting. Construct tilings interactively using a mouse -- "like doing a jigsaw." Alhambra comes with many tile shapes already supplied; the site offers images created from the
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- Tiling Plane and Fancy - Steve Edwards
The 17 wallpaper groups identify the plane symmetry groups and link to background patterns illustrating them. Tiling Definitions define, with examples, the terms fundamental region, isohedral tiling (isohedral and non-isohedral), isogonal tiling, lattice,
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- Time4Learning - John Edelson, Founder
An online home-based learning system with multimedia lessons, interactive exercises, printable worksheets, assessments and quizzes for use in homeschool, tutoring, or summer programs. See, in particular, their Homeschool Math Curriculum. Sample lesson
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- Time Engineers - Ray Shingler, Clay Schultz, and David Bielat
In this video game, middle and high school students explore and apply fundamental principles of engineering by traveling in a time machine to build pyramids, irrigate farm land, steer a submarine, raise and lower medieval drawbridges, operate radar, launch
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- Time Engineers - Software Kids
A CD-ROM game of interactive, open-ended engineering problems to solve by using math and science skills, designed to help middle and high school students explore and apply some of the fundamental principles of engineering. Time Engineers encourages trial-and-error
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- Time Math - Education 4 Kids, Inc.
Time, at different levels of complexity (clock and calendar). You are presented with two times (in one of the formats selected) and asked to determine the difference between the two.
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- Time: Minutes and Hours - NASA Lewis Learning Technologies Project
Roberta left for her dancing class at 3:45 p.m. Her dancing school is a 15 minute walk from her house, and her class lasted one and one half hours. What time did she get home if she went straight home? A detailed answer is provided. From NASA's 9th Grade
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