 National Physical Laboratory  United Kingdom Department of Trade and Industry
The United Kingdom's National Standards Laboratory. The searchable site contains year 2000 countdown; news and information on upcoming symposia and other conferences and events; usability services; dimensional metrology; a pressure and vacuum section;
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 Native Access to Engineering Programme (NAEP)  Concordia University, Montreal, Quebec, Canada
Over 1000 pages of free math and science education resources and activities. nativeaccess.com is the domain for the Native Access to Engineering Programme's elearning community.
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 The Nature of Physical Science  Richard Brill
A Honolulu Community College course, based around the Web and a series of television programs, that focuses on the history of science and its effects on our culture. Study guides are detailed outlines of various topics, including the foundations of arithmetic,
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 New York Regents Exam Prep Center  Oswego City School District
A site dedicated to assisting high school students in preparing for the "new" New York State Math A Regents Examination. Covers Algebra, Geometry, and Algebra II/Trig. The materials featured for each topic include: general review/formula sheet, Regents
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 New Zealand Mathematics  Ministry of Education, New Zealand
Units and lesson plans organised by level and curriculum strand, in Maori and English, focusing on solving problems. Topics address levels 16 of the New Zealand mathematics curriculum and include probability, statistics, measurement, and geometry.
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 NIST Virtual Library (NVL)  National Institute of Standards and Technology
Online library of the National Institute of Standards and Technology. Includes subject guides, an online library catalog, NVL databases, a selection of electronic journals, NIST publications, online resources, global Web resources, and hints and help
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 NSDL Middle School Portal: Math Pathway  NSDL; the Ohio State University
A middle school portal into NSDL's math resources, browsable by topic, or choose a preselected set of resources on given subjects.
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 The Nuffield Foundation
Math teaching and learning resources include freely downloadable Freestanding Mathematics Activities (FSMAs) and Applying Mathematical Processes (AMP) activities, a mix of investigations and practical explorations. The Nuffield Foundation works to improve
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 Numeracy Games  James Barrett
Flash games in number facts (including funky mummy and brilliant beadstring), counting (funny fingers and duck shoot), bridging through 10 (techno tortoise and +/ number lines), time (hickory dickory and fairy clock), shape and measures (shifting shapes),
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 Online Conversions  Oren Harhel
JavaScript for converting or calculating greatest common divisors (GCD) and least common multiples (LCM); linear regressions; geometric means; one's complement and two's complement; Roman numerals; means, medians, modes, and ranges; from decimals to fractions,
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 Online Ideas Maths Resources  James Bancroft
Problems in Microsoft Word, HTML, and JPG, organized into general resources; addition and subtraction; multiplication and division; numbers and the number system; fractions, decimals, percentages, ratio, and proportion; real life problems; measure and
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 Onlineunitconversion.com
Oover 225,000 conversions, togethr with explanations of their history and use.
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 OpenEnded Math Problems  Gwenn Holtz and Mary Lee Malen, Levering School and the Franklin Institute
An eightmonth slate of openended problems for middle school students to solve in preparation for standardized testing. The authors have composed and selected problems that lend themselves to multiple solution paths, and then organized them into three
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 Oranges Project Page  Debbie Lewis; The Levering School, Philadelphia, PA
An eighth grade project. Students use measurement to investigate the proportional relationship between the edible part of an orange and the peel or inedible part of a orange. They investigate different types of oranges such as navel, blood, and clementines
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 ostermiller.org  Stephen Ostermiller
Converters, Calculators, and JavaScript include Multiplication Game, in which letters represent digits in a multiplication problem; Length, which converts between units of length and distance; Roman Numerals, which converts between Arabic and Roman numerals;
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 Paper Cup Mathematics  Jerry Neidenbach, Sue Harvey, and Marilyn McArthur; Park City Mathematics Institute
In this classroom activity, a PCMI Resource for Teachers, students investigate whether paper cups roll out the pattern of an annulus and how you can tell, how the dimensions of the cup relate to the dimensions of the annulus, and whether you can predict
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 Pearson Learning  Dale Seymour Publications
A leading publisher of educational materials, emphasizing math, science, and the arts. The site contains: an online catalog; math curricula include: CMP (the Connected Mathematics Project) and Investigations (Investigations in Number, Data, and Space,
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 Percents (SMILE)  Albert Michael, Robert Fulton Elementary School
A lesson for grades 35 designed to teach students to rename ratios, decimals, and fractions as percents; change ratios into percents; weigh items on a scale; and multiply decimals. From the Practical and Applied Math section of a collection of almost
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 Phenomenological Pizza (SMILE)  Robert Foote, Disney Magnet School
A lesson for the middle grades designed to teach students to calculate the area of a circle, find how many twotopping pizzas can be made using 14 toppings, and determine cost per square inch. From the Geometry and Measurement section of a collection
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 PhotoMath  Martha Jean Barrett; Kodak
A project where students created their own mathematical board games for use with younger or less advanced students, for grades 48. Working in teams, advanced students covered seven math categories: whole numbers, decimals, fractions, measurement, geometry,
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 PlaneMath  InfoUse, in cooperation with NASA
Materials for elementary school students about math and aeronautics, designed to stimulate and motivate students with physical disabilities in grades 47 to pursue aeronauticsrelated careers via the development and delivery of accessible math education
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 Polymath Love  Gary Smith
Free and lowcost Macintosh software for middle school mathematics: over
200 programs written by a classroom teacher. Program descriptions and some free programs are available to download from the Web, or order the CDROM for $100 U.S., which includes
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 Portion Distortion  National Institutes of Health (NIH)
How do the portions served in today's fast food restaurants compare to those available 20 years ago? Take the "Portion Distortion" quizzes to learn exactly how much portions have "super sized," as well as the amount of physical activity required to burn
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 Potent Problems  Institute for Studies in Educational Mathematics
A database of problems that deepen understanding of mathematics through multiple answers, approaches to an answer, interpretations, extensions, perspectives on a mathematical idea, layers of complexity, or algorithms. Potent problem content topics include
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 PreAlgebra (Middle School Math)  Homeworkhelp.com, Inc.
Free prealgebra lessons on: types of numbers (numbers and their properties, negative numbers); fractions (reducing, multiplying, dividing, adding and subtracting, mixed numbers, comparing fractions, ratios & proportions, percentages, decimals, scientific
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 Printables: Student Handouts  The Learning Network
PDF format printable handouts. Browse by grade or subject; check out the featured handouts; or search for a topic of your choice. Other resources also available through the Lesson Planning Center links on the site.
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 The Private Eye  Kerry Ruef
A handson, investigative teaching approach that attempts to stimulate the wonder of looking closely at the world, thinking by analogy, changing scale, and theorizing. It uses everyday objects, a jeweler's loupe, and a series of simple questions, which
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 Problem Solving in Mathematics  Jim Wilson; Univ. of Georgia
Problems in algebra, geometry, conversion, cryptarithm, "mean," trigonometry, and a mixture of all, many with comments and solutions, from a course given in the Dept. of Mathematics Education at the University of Georgia. The site also provides links
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 Project Interactivate  Shodor Education Foundation, Inc.
Interactive middle school lessons on number and operations, geometry and measurement, functions and algebra, and probability and statistics. They feature: online activities (illustrative Java applets including: Venn diagrams; clock arithmetic; Pythagorean
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 Project SkyMath: Making Mathematical Connections  University Corporation for Atmospheric Research
Using the science and language of patterns to explore the weather. A middle school mathematics module using realtime weather data and current environmental issues to promote the learning of significant mathematics, consistent with the NCTM Standards.
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 ProTeacher  ProTeacher
A teachercreated resource site for elementary schoolteachers, offering lessons and materials, education news, links for finding schools, news and weather, and a reference desk. An index of links to information on various academic subjects includes Mathematics
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 Putting the Pieces Together (Making a Fractional Quilt) (SMILE)  Demetria E. McKnight, Bateman Elementary School
An lesson designed to motivate students to develop a sense of equivalent fractions; explore addition of fractions with unlike denominators; and learn to divide a whole number into specified equal parts. From the Arithmetic section of a collection of almost
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 Puzzlers  Bryan Clair, University of Chicago
A collection of Clair's favorite puzzles (no discussion or answers are provided): The Nine Dots; Weighing Coins; The Dollar Hotel, Planning an Orchard; The Math Department; Tea and Cream; Bugs on a Square; River Crossing; More Crawling Bugs; The Unexpected
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 Ratio, Percent & Proportions (SMILE)  Rosalyn Winston, Walt Disney Magnet School
A lesson on fractions as percents, designed to teach 7th graders to find the percent of a number; find percents using proportions; calculate the weight of objects (beads) in grams given specific percents; and verify the weight of objects (beads) on a
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 Ratios and Proportions (SMILE)  Mamie P. Scott, Edward Coles Elementary School
A 7th grade lesson designed to review ratios and proportions and to teach students to determine the relation between individual height and reach; find equal ratios; solve word problems using ratios by trial and error; and practice finding pictorial expressions
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 Reading a Protractor or a Ruler  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about reading a protractor or a ruler, such as "What do the little lines on a ruler stand for?"
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 Real World  Lesson Ideas: Math; Teachnet.Com
Activities: Buy Groceries; Plan Christmas Vacation; Credit Cards for Kids; Who's Average?; Carpet Your Classroom; Division from a Printer's Viewpoint.
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 Real World Math  Thomas J. Petra
Lessons that use Google Earth to teach math include Oil Spill Estimates and Scientific Notations; Iditarod Challenge and Typhoon Project; Four Color Map and Mazes & Labyrinths; Crop Circles and Fractal Measurement; Lunar Sports and Rockets. Each lesson
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 Rectangle Perimeter and Side Length  NASA Lewis Learning Technologies Project
A rectangle with a perimeter of 24 inches might have adjacent sides measuring: 6 inches and 4 inches; 11 inches and 13 inches; 9 inches and 3 inches; or, 2 inches and 12 inches? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 ReInventing FourthGrade Mathematics  Jack J. Lopez; Kodak
A series of four related activities through which students acquired a firm, active knowledge of some of the basic terminology of Euclidean geometry, learning the vocabulary for describing various geometric shapes and transformations. Students photographed
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 Resource Room (Math Central)  University of Regina, Regina, Saskatchewan, Canada
French version: Centre de ressources. A service of Math Central that allows mathematics educators to share resources having to do with math teaching. Submissions are stored in a database that can be browsed by educational level and curriculum strand,
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 Rich Maths Tasks to Engage  East Midlands Maths Network
These teachermade rich maths tasks in number, algebra, shape, and data handling emerged from a collaborative project run by Jon Stratford, Lead Practitioner for the Specialist Schools and Academies Trust (SSAT): arrangements, clock face, chocolate dilemma,
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 Road Sign Math  Jamie Thingelstad
"Driving + Math = Fun." A game to play on the road, identifying signs that suggest basic or advanced arithmetic, or that display constants, sequences, or primes. See digital photographs of actual street and highway signs that meet the "RSM" rules. Submit
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 Rocket High (SMILE)  Elizabeth Kelly, Pilsen Community Academy
A lesson for grades 78 designed to reinforce students' measurement skills by having them manipulate a launcher to create specific angles, introducing them to the concept of tangents. From the Recreational and Creative Math section of a collection of
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 Rockin' the Standards
Musical recordings by a rock band led by a veteran elementary school teacher who takes the lyrics from common tunes and changes them to help kids remember what they've been taught in school. Each of the fourteen songs on the album "Rockin' the Standards
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 The Saqquara Ostrakon  A. D. Conner
An article with background history and a new analysis: A unique 3rd Dynasty (~2600 B.C.) Egyptian artefact thought to be an architect's drawing has heen reevaluated by the author and the geometry reveals surprising results.
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 SCalculate  Sookshma Chetas Softwares Pvt. Ltd.
Key values into the boxes to expand algebra expressions, calculate geometry areas and volumes, and convert weights, distances, time, memory, and other units.
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 The Scale of the Universe 2  Cary and Michael Huang
Use the scroll bar or computer mouse wheel to zoom in and out  from quantum foam to charm quarks to "smallest thing visible to an optical microscope" to the thickness of paper all the way up to Cruithne, the depth of the Mariana Trench, Minecraft World,
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 Science and More  PublicLiterature.org
This site has a section on applied mathematics educational resources. Topics include projectile motion, differential equation solving, collisions, unit conversion, and prime number generation. Most software is
open source.
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 Scientists in the City  The Franklin Institute Online
Public Science Day is an annual event, organized by the American Association for the Advancement of Science (AAAS), when students visit informal science institutions in Philadelphia, PA. In 1998, ten schools visited The Franklin Institute for the day
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