 The Islamic Calendar  Helmer Aslaksen
A page featuring the rules for the Islamic calendar in different countries; the mathematics of the Islamic calendar in Singapore; The Date of Hari Raya Puasa; the arithmetical calendar, and related links.
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 It's About Time (SMILE)  Vernita Smith, Mahalia Jackson Elementary School
A lesson for grades 12 designed to teach students to tell time to the hour on an analog clock, and how to compare more and less time. From the "Miscellaneous" section of a collection of almost 200 single concept lessons by the Science and Mathematics
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 I Used To Believe  Mat Connolley
A collection of childhood beliefs, such as thinking that cats are female dogs, that seeds swallowed will sprout fruit from your ears, and a primal fear of toilets. "Some of the beliefs come from overactive imaginations, but a lot are the result of parental
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 Jude eClock : Mr. Myers' Classroom  Nathan Myers
Virtual manipulative for teaching various concepts in telling time. Features include the ability to change the clock's face (two different primary faces, Roman numerals, 12369, & graduated markings only), display of time in digital format, display
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 Judy's Applications
Various calculatortype programs, including: Judy's TenKey (calculator program which features an editable tape which automatically recalculates when you make changes among other features, and a free demo version is downloadable here), Judy's Conversions
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 King of Mnemonics  Anton Prasolov
Prasolov's Hermes tables, alongside poems such as "fact dense fogs warm suns defy," help you remember mnemonics for determining large cubic roots, weekdays from dates, and more. Demo or purchase his King of Mnemonics (KoM) Windows software. Inspired by
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 KS3 Maths Homework Series  Stafford Burndred; Pearson Publishing (U.K.)
A series of 6 homework packs providing 180 different homework sheets covering levels 38 of the UK National Curriculum (ages 1114). Each pack addresses a separate level, and exercises use a speed marking system so that a full class can be marked in about
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 The Ladies' Diary  Ivars Peterson (MathLand)
The Ladies' Diary: or, Woman's Almanack was published annually, starting in 1704. Printed in London, it featured the usual stuff of almanacs: calendar material, phases of the moon, sunrise and sunset times, important dates (eclipses, holidays, school
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 Learn Math 3D on Orbital One  Peter Richards
A software math course set within a real time 3D environment. Topics covered include counting, the number system, addition, subtraction, multiplication, division, 2D and 3D shapes, simple fractions, and telling the time.
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 Learn To Tell Time  Softseek.Com
Several educational shareware titles for DOS and Windows for learning to tell time, some animated.
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 Lectures  John Conway, Princeton University
Listen to audio of Conway's lectures: Calendar Conundrums; Archimedes and His World; Cantor's Infinities; Goedel and Undecidability; Geometry, Logic and Physics; Escher and Symmetry; Finally, Fun. Requires Real Player.
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 Loan*Calculator! Plus for Windows  Pine Grove Software
Loan, Interest Due/Calendar Math, Remaining Balance, Accelerated Payment and Balloon Payment calculations available, and amortization schedules. Version 2.0 added the notion of "Financial Advisors". Advisors provide text based answers to a particular
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 The Lunar Calendar in Japan  Steve Renshaw and Saori Ihara
The history of the lunar calendar in Japan: differences from the Chinese calendar and efforts toward modernization.
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 Make Your Own Chinese Calendar  Zhuo Meng
"The Chinese calendar is a lunisolar calendar based on the motions of the sun and the moon as observed on the earth. It is necessary to add a leap month once in a while and the rules for adding a leap month is not simple. The result is that few people
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 Making a Better Calendar (Math Chat)  Frank Morgan; Christian Science Monitor
Our current calendar divides the 365day year into 12 months, or 52 weeks plus one extra day. Find a better calendar system. For example, are 7day weeks best? Is there any way to avoid needing a new calendar every year?
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 Math  Donna Young
Manipulatives, graph paper, and worksheets to print and reproduce for home or classroom use: coordinate grids, clocks for math, charts for math, triangular math facts cards, play money, math drill sheets, fraction manipulatives, unit multipliers, and
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 MathDrills  Elias and Daniel E. Saab
Math drills with randomly generated problems, with details and hints and scores kept. Types of drills include problems on distance, speed, and time; job completion; roots of polynomials; percentage word problems; arithmetic attack; fraction attack; bases;
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 Mathematical Models for the Classroom  Foster Manufacturing Company
Manipulatives handcrafted for use in the furthering of mathematics education. The catalog of wood products includes solids generated by crosssections on a circular base, solids of revolution (to illustrate integration by cylindrical shells, by washers,
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 Mathematics Computation and Problem Solving  RHL School
Worksheets for addition, subtraction, and multiplication. Every time you revisit or refresh one of these practice sheets, it's new. Teachers may copy single sheets for all their students, or give students similar but unique sets of examples. See also
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 The Mathematics of the Chinese Calendar  Helmer Aslaksen
A page that explains the mathematical rules for the Chinese calendar and includes a Paper on the Mathematics of the Chinese Calendar (in PDF format).
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 Math Fun and Educational Gifts and Specials  24Hours7Days
Purchase Clever Catch Balls, Fraction Bars, Decimal Squares, Math Chase, and other board games and manipulatives for practicing addition, algebra, decimals, division, fractions, money, multiplication, patterns, subtraction, and time.
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 Math Olympiads for Elementary and Middle Schools
An international mathematics competition for elementary and middle school students. Individual students can take one exam each month from November to March. The site includes a few sample problems and information about ordering materials and joining the
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 Maths & Numeracy Games  Keen2Learn
Increase understanding and build up speed in preparation for tests, SATs, 11+ and GCSE exams with Keen2Learn's maths and numeracy games on adding and counting, algebra, division and multiplication, fractions, numbers, percentage, shape and space, subtraction,
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 Math Stories.com: House of Math Word Problems for Children  MathStories.com, Inc.
Word problems for grades 16, singly and in interactive or printable worksheets. Problems cover all five major math strands, and include openended and critical thinking problems. Problems are aligned to state and NCTM standards, and available in English
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 Math Travels  Real World Math
An integrated simulation of U.S. travel for grades 412. Students develop reading, writing, math, social studies, and art skills by planning vacations across states, applying concepts of measurement, multiplication, division, decimals, and time. The site
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 A Matter of Time  Thinkquest 2007
This site examines the concept of time, in both English and Greek, from its suggested beginning to its projected end. It explores and engages the reader with varying views of time from scientific, religious, and cultural perspectives.
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 Mayan Mars  Ivars Peterson (MathTrek)
In 1601, Johannes Kepler undertook the challenge of deciphering the orbit of Mars and developing a mathematical theory of its motion to fit observations of the planet's changing position in the sky. In assuming that Earth itself traveled around the sun,
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 The Mayan Numerals  Michiel Berger
(See also the Maya Calendar page.) Instead of ten digits, the Mayans used a base number of 20. They also used a system of bars and dots as "shorthand" for counting: a dot stood for one and a bar stood for five. This page provides a table of numerals and
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 Measurement of Volume (SMILE)  Richard Murray, Gage Park High School
A lesson designed to teach students to measure the volume of a clear container; use a stop watch; and estimate the volume of a container using proportions. From the Geometry and Measurement section of a collection of almost 200 single concept lessons
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 Measurements Converter  Sergey Gershtein
JavaScript conversions in the following categories: weight, capacity and volume, length, area, speed, pressure, temperature, circular measure, and time. [Do not use this converter if you need precision calculations.] You will need a Javacapable browser
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 Measurement Units Translation  Sergey Gershtein, UralRelcom, Ltd.
Javascript converters for weight, capacity and volume, length, area, speed, pressure, temperature, circular measure, and time.
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 megaConverter.com  BenCam InterMedia
megaConverter.com is an evergrowing set of weights, measures and unit conversion/calculation modules. Spin a dial to select the kind of unit to convert: ancient lengths, volume, weight; angles; area; astronomical distance; bases  dec/hex/oct/bin; density;
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 Metrics Matter  ThinkQuest Junior
A simple introduction to the metric system, starting with a basic explanation of how the metric system works. Read about the metric system in relation to other methods of measuring, and learn how to measure time, length, volume, mass, and temperature.
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 Michigan Math Scholars
A summer program for high school students at the University of Michigan. Program information, mathematics news, a student paper ("On the Problem of Dividing a Clock Face Into Equal Thirds"), several online courses (The Nature of Infinity; Chaos; Graph
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 A Million/Billion Seconds  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about millions and billions of seconds, such as "What is a million seconds in weeks, days, hours, minutes, and seconds?" and "How can I work out the number of seconds since 1980, taking leap years into account?"
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 Motion Mountain Project  Christoph Schiller
A mountain hike along the concepts of modern physics  a free physics textbook in English and Dutch, in PDF format, intended for anybody with an indepth interest in physics and in nature. The aim is to write an exciting universitylevel textbook  if
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 Mrs. Cortes' Teacher Resources  Aida Cortes
Colorful monthly math calendars, available in Spanish and English, for interactive white board use (Activeboard™ and Smartboard™). Each seasonally appropriate template, created by a first grade North Carolina teacher native to Colombia, includes
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 Multicultural Math Fair  Suzanne Alejandre, Frisbie Middle School
Twentynine percent of Frisbie's student population is Limited English Proficient; Arabic, Cambodian, Chinese, German, Indonesian, Korean, Philipino, Polish, Portuguese, Romanian, Samoan, Spanish, Taiwanese, Vietnamese, and Urdu are represented. In 199394
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 Numbersense Games  Hassan Baajour, Research Officer
Games for practicing clock time, counting, and more, developed at the London Knowledge Lab (LKL).
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 Numbers from One to ThirtyOne: A Page for Each Day of the Month  Richard Phillips, Shell Centre for Mathematical Education
Trivia about the calendar numbers one through thirtyone. Based on the book Numbers: Facts, Figures and Fiction, which answers questions such as how Room 101 got its name, what you measure in oktas, and which number links Alice in Wonderland, rainbows
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 Numeracy Hour Activities  Ambleside Primary School on the Web
Games designed by or with children, and interactive teaching programs to download. Games and activities include Amblegraph (create simple bar charts online); Online Calculator; Analogue Clock (a time teaching tool); Table Trees (multiplication tables);
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 Odd Day  Ron Gordon
Mathematical observations, original musings, news coverage, and cartoons in celebration of January 3, 2005 (1/3/5), July 9, 2011 (7/9/11), and other times when three consecutive odd numbers make up the date. Gordon, retired from teaching high school in
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 The Playground of Mathematics  Cilenia
JavaScript practice in addition, subtraction, multiplication, division, time, and comparison ("greater than, equal to, or less than"). Select difficulty, complexity, position of unknown, duration, and other settings. Also available in Russian, Italian,
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 Problem Pictures  Richard Phillips
A CDROM of 184 attractive, unusual, or puzzling color photographs accompanied by activities for mathematics teaching. Images may defy explanation, motivate investigation, or inspire the viewer to answer a question. Other pictures may be the starting
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 Pure Numbers Daily Blog
New equations every day, made of the individual numerals in the date. Daily entries in this blog, launched on 11 October, 2012 (10/11/12), preserve the order of the individual digits using arithmetic, geometry, trigonometry, combinations and permutations,
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 River Crossing (Math Exploration Quilt)  Rik Littlefield; Hanford School
You want to cross a river to reach a point exactly opposite where you are currently standing. Explore this problem stepbystep, encountering the following basic ideas: 1) Pythagorean theorem; 2) time = distance / speed; 3) distance = time * speed; 4)
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 Roman Numerals  Math Forum, Ask Dr. Math FAQ
Basics: How do I read and write Roman numerals? What are the rules for subtracting letters? How do I write large numbers? Web resources: introductions, charts, calculators, and converters. Calculations: Did the Romans use fractions?
How can I use Roman
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 Rounding Seconds  NASA Lewis Learning Technologies Project
Erv ran the 110 meter high hurdles in 13.27 seconds. His teammate, Willie, ran the same race in 12.91 seconds. Rounded to the nearest tenth of a second, how much faster was Willie's time? A detailed answer is provided. From NASA's 9th Grade Math Proficiency
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 SafeT Compass  Maddy, Maverick; James Garner
A compass with no sharp points, flat enough to use as a bookmark in a high school geometry or algebra text and safe enough for a child. Draw circles from 1/4 in. to 10 in. in diameter with this new flat compass. $2 each, 2 for $3 postpaid. See also their
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 Teaching Time  Mark Cogan
A resource for teaching time. The site includes an interactive clock as well as online games and innovative worksheets.
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