 0! = 1  Math Forum, Ask Dr. Math FAQ
Why does 0! = 1 ?
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 0.9999 = 1  Math Forum, Ask Dr. Math FAQ
Why does 0.9999... = 1 ? An answer adapted from the sci.math FAQ.
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 0h h1  Martin Kool
A "little logic game" related to Takuzu and Binario: complete grids of 4 × 4, 6 × 6, 8 × 8, or 10 × 10 so that all rows and columns have an equal number of each color, but none has three adjacent tiles of the same color or shares the
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 1000 Lockers  Math Forum, Ask Dr. Math Common Question
A selection of answers to the "locker problem": "There are 1000 lockers in a high school with 1000 students. The problem begins with the first student opening all 1000 lockers; next the second student closes lockers 2,4,6,8,10 and so on to locker 1000;
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 100s and 1000s  Horsham Primary School; WimmeraNet
An Internet project from Horsham, Victoria, Australia. Activities about 100s and 1000s, a Wimmera Global Classroom project coordinated by Ian Clough at Horsham 298 to recognize the beginning and end of a century and a millennium. Contributions are added
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 100th Day of School Celebration  Loogootee Community Schools, Loogootee, Indiana
A collection of interactive and other suggested classroom activities for celebrating the 100th day of school, for kids ages 814. A 100 EMail Messages Project invites your class to exchange email worldwide, linking geography and language arts with a
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 The 101questions Blog  Dan Meyer
A blog "to perplex my students, to put them in a position to wonder a question so intensely they'll commit to the hard work of getting an answer, whether that's through modeling, experimenting, reading, taking notes, or listening to an explanation." Look
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 10 Lessons in Fractals, Complex Patterns, and Chaos  Jon Lee; Math Forum Teacher Exchange
From the WrightConnection 8week summer program, in which Dayton, Ohio, middle and high school math and science teachers participated in the realworld applications of math and science at WrightPatterson Air Force Base. The lessons, which emphasize
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 10th Grade Math Assignments  Richard Briston
A math teacher designs Web pages to serve as monthly math assignments, and as an introduction to the Internet and email for his students at St.Mildred'sLightbourn School in Oakville, Ontario, Canada. Student solutions are included for some assignments.
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 10ticks.co.uk  Fisher Educational Ltd
Games, puzzles, and help aimed at the National Numeracy Strategy of the United Kingdom. National Curriculum Compliant maths worksheets for teachers. Registration required.
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 11tutor  Synergy Education International Pvt. Ltd
This online tutoring service engages students with VoIP communication and an interactive whiteboard. 11tutor also offers "overnite solution" homework help; certification programs for preprimary and primary teachers; school adoption programs; and more.
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 123math.ca  Math Made Easy
A program that supplies flash cards, number lines, learning lessons, audio material, emails, and telephone contacts with parents to help students master basic facts of addition, subtraction, multiplication, and division. Cost is $30 Canadian registration
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 The 15 Most Famous Transcendental Numbers  Cliff Pickover
Numbers like e = 2.718..., pi = 3.1415..., and 2^(sqrt 3) are transcendental. These numbers are not the solutions of polynomial expressions having rational coefficients. The digits of pi and e never end, nor has anyone detected an orderly pattern in their
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 1996 Puzzle  Ruth Carver, Math Forum
For students in grades 312 with a general knowledge of mathematics. Using the digits in 1996 and any operations, try to write equations that have the numbers from 0 to 100 as the answer. The answer for each number and the name of the first person to
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 1997 Puzzle  Ruth Carver, Math Forum
For students in grades 312 with a general knowledge of mathematics. Using the digits in 1997 and any operations, try to write equations that have the numbers from 0 to 100 as the answer. The answer for each number and the name of the first person to
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 1998 Puzzle  Judy Brown, Math Forum
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 1998 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for
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 1999 Laptop Learning Challenge (LLC)  Toshiba/NSTA
This challenge rewarded 20 K–12 educators for their innovative uses of laptop computers. The 20 selected lessons may be browsed by subject (abstracts and downloadable PDF files are provided); they have science, mathematics, and technology components and
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 1999 Puzzle  Judy Brown, Math Forum
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 1999 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for
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 19th Century Schoolbooks  University of Pittsburgh
Search the full text of dozens of antique books used to learn and practice arithmetic and other mathematical subjects in the schools of 1800's America. Browse scanned images (gif or PDF) of centuriesold pages, or search for text within primers, readers,
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 2000 Puzzle  Judy Brown, Math Forum
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2000 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for
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 2001 Puzzle  Judy Brown, Math Forum
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2001 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for
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 2002 Puzzle  Judy Brown
For students in grades 312 with a general knowledge of mathematics. Use the
digits in the year 2002 and the operations +, , x, ÷, sqrt (square root), ^
(raise to a power), and ! (factorial), along with grouping symbols, to write
expressions for
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 2003 Puzzle  Judy Brown
For students in grades 312 with a general knowledge of mathematics. Use the
digits in the year 2003 and the operations +, , x, ÷, sqrt (square root), ^
(raise to a power), and ! (factorial), along with grouping symbols, to write
expressions for
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 2004 Mathematics Puzzle  Judy Ann Brown
For students in grades 312 with a general knowledge of mathematics. Use the
digits in the year 2004 and the operations +, , x, ÷, sqrt (square root), ^
(raise to a power), and ! (factorial), along with grouping symbols, to write
expressions for
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 2005 Mathematics Puzzle  Judy Ann Brown
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2005 and the operations +, , x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for the
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 2006 Mathematics Puzzle  Judy Ann Brown
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2006 and the operations +, , x, ÷, ^ (raised to a power), sqrt (square root), and ! (factorial), along with grouping symbols, to write expressions for the
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 2007 Mathematics Puzzle  Judy Ann Brown
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2007 and the operations +, , x, ÷, ^ (raised to a power), sqrt (square root), and ! (factorial), along with grouping symbols, to write expressions for the
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 2009 Mathematics Puzzle
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2009 and the operations +, , x, ÷, ^ (raised to a power), sqrt (square root), and ! (factorial), along with grouping symbols, to write expressions for the
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 2010 Mathematics Puzzle
For students in grades 312 with a general knowledge of mathematics. Use the digits in the year 2010 and the operations +, , x, ÷, ^ (raised to a power), sqrt (square root), and ! (factorial), along with grouping symbols, to write expressions for the
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 21st Century Educator  David Wees
Wees serves as the learning specialist for information technology at Stratford Hall (Vancouver, BC). His blog posts, which date back to November, 2008, have included "Creating a WiiMote interactive white board at my school for under $50," "Eight Videos
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 21st Century Problem Solving  Howard C. McAllister
Examples of problems solved using reliable problem solving methods; discussion of the principles of reliable problem solving; a FAQ; and an evolving encyclopedia of solved problems in mathematics, physics, and chemistry. The main focus is on precollege
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 21st Century Teachers Network (21CT)  The McGuffey Project
A joint undertaking by several leading education organizations to encourage, recognize, and support educators who are developing skills in new technologies and using them in innovative ways with students and colleagues. This initiative is in support of
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 22nd Annual AMATYC Conference (Mathematics Archives)  John St. Clair, Editor
Presentations and contributed papers on mathematics education, improving quantitative literacy, multimedia in the classroom, realworld activities and applications, and more, from the proceedings of the TwentySecond Conference of the American Mathematical
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 The 24 Game  Suntex International Inc.
A site showing all the editions, challenge rules, tips, hints, and more about the 24 Game. Designed for all ages, play proceeds by creating the number 24 from the four numbers on a game card using addition, subtraction, multiplication, or division. Watch
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 24 Theory
This "hobby website" offers JavaScript that calculates, enumerates, and displays all distinct solutions and solvable scenarios to the popular arithmetic card game, as well as interactive tables. 24theory.com also provides an online version of the 24 game
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 2Learn.org  Linda Blumenthal, Thinkwell Corp.
Offering a variety of products including a comprehensive learning plan, created online. Many free resources for teachers, parents, and students, as well. Math games and tools.
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 30 Second Challenge: The Fun Way to Learn Mathematics  Norman D. Lock
eBooks (PDF format) that provide an entertaining approach to developing mental arithmetic skills.
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 3.1415926...  TWON, INC.
This visualization of the first four million decimal digits of π shows each of the digits 09 as a different colored pixel. Slide the navigator down to see the numeric "snow" representing the digits 500,001 through 4,000,000; search for any number
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 360 Degree Math  Sean Kavanaugh
"What if there was a way to make the thinking of each student visible to the teacher throughout the lesson?" 360 Degree Math classes begin with the teacher personally greeting each student as she enters the classroom ("The Exchange"); students solving
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 39 ERIC Citations for Block Scheduling  Catholic University of America
These citations are divided into the following categories: Research Reports for Block Scheduling; Identifiers (ERIC controlled vocabulary term); Title Phrase; Free Text Phrase; and Copernican Plan. Directions for ordering ERIC journals and documents cited
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 3Blue1Brown  Grant Sanderson
Video explanations that elucidate with computer animations, changes in perspective, humor, and — occasionally — rhyming voiceover: Euler's formula, circle division (disjoint regions obtained by joining n points around a circle), and complex
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 3DCalculator  Andre Bullitt Software
Download a demo (Windows 95), see a short video, or purchase for U.S. $10.00 online.
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 3D Drawing and Geometry  Cathi Sanders
A Math Forum Summer 1998 Institute project that uses examples of paintings, architecture, etc. to analyze different types of 3D drawings, and teaches students how to create them. Careers in 3D drawing that use these techniques, from architecture to
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 3D Stars  Free Instructions  James E. Garner
Free instructions for making 3D paper stars, using basket weave technique.
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 4000 Years of Women in Science  University of Alabama
Over 125 women scientists from our scientific and technical past, with biographies, references, and photographs. For Mathematicians, see Listing by Discipline.
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 42eXplore  Annette Lamb and Larry Johnson
Web projects that offer definitions, activities, four good starting points, and many more links and resources for thematic topics such as charts and graphs; codes, ciphers and secret messages; fractals, tessellations, geometric shapes, and figures; number
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 42nd International Mathematical Olympiad: Math Expands Horizons  Dr. Walter E. Mientka, Executive Director
This event brings to the USA 500 of the most talented high school age mathematicians from more than 80 countries. Washington, DC, hosts the Olympiad, with opening ceremonies on July 4, 2001. The American mathematics community uses this opportunity to
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 50 States' Certification Requirements  College of Education, University of Kentucky
Links to teacher certification requirements for all 50 states, as well as a K12 job opportunities database.
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 5 Numbers  Simon Singh and Marcus du Sautoy, BBC Radio 4
Web pages and Real Audio Music downloads of fifteen minutelong radio broadcasts that take a "quirky look" at zero, pi, the golden ratio, i, and infinity. "Hear about the stark reality behind the imaginary number, try a slice of pi, find out about the
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 5 x 5 Magic Squares  H. B. Meyer
An interactive page dedicated to the construction of 5 x 5 magic squares. You may move the numbers manually, watch the computer slowly create a magic square, or have the computer quickly generate a magic square. Requires JavaScript.
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