 Negative Times a Negative  Math Forum, Ask Dr. Math FAQ
Why does a negative times a negative equal a positive? Does this ever happen in the real world?
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 NetDay
NetDay promotes the effective use of technology for education, providing direct assistance to underserved schools, and general assistance to decisionmakers. Its programs include original research, national surveys, and articles and resources resulting
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 Network Tutors
Provide online worksheets and learning plans for elementary and middle school students. Provide tutors in all areas up to college level courses. Various plans available.
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 Neufeld Learning Systems, Inc.
Mathematics programs designed to facilitate learning in destreamed classes as well as in home study and distance learning. Interactive programs for: algebra, equations, exponents, fractions, geometry, and integers. Understanding exponents and algebra
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 New Classrooms  New Classrooms Innovation Partners
From the advocates of the "Teach to One: Math" curriculum, individualized instruction that "reimagines the role of educators, the use of time, the configuration of physical space, and the use of data and technology within traditional public, charter,
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 New Directions in Pedagogy in Other Courses  Mathematics Education at the Math Forum
Examples of mathematics courses being revised in the light of new approaches to pedagogy: articles and presentations at conferences in probability and statistics; precollege algebra; linear algebra; abstract algebra, and differential equations.
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 New Geometric Tilings  Adrian Fisher Maze Design
A page that celebrates the beauty of 4, 5, 6, and 7fold geometric tilings, grouped according to the regular polygons that they fill. Where possible, actual dates and designers are stated. Nearly all these tiling examples are based on sides of the
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 The New Jersey Mathematics Coalition
The New Jersey Mathematics Coalition (like the other 50 such state Coalitions) was created to facilitate and encourage improvement in the teaching and learning of mathematics as recommended in the national reports. The Coalition serves as a catalyst for
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 New Jersey Mathematics Curriculum Framework  New Jersey Mathematics Coalition
Online copy (in PDF format) of the Curriculum Framework presented to the NJ State Board of Education in January, 1997. The Framework was developed to provide information, guidance, and assistance to teachers and curriculum developers in implementing
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 NewPath Learning
Publishers of handson print and interactive digital learning resources for reinforcement and review. See, in particular, NewPath Learning products for math, browseable by grade and national or state standards. Shop for and purchase Curriculum Mastery®
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 New Standards  Beauregard Parish (Louisiana) Public Library
Links to sites with information about and discussions of standards, both countrywide and particular to Louisiana.
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 The New Teacher's Guide to the U.S. Department of Education  Richard W. Riley, Secretary of Education
Archived information as of September 2000. See the current Teachers page for uptodate information. This site contains information on teachinga national priority; voluntary national tests in reading and math; raising academic standards; grants and
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 NewtonsWindow.com  Suzanne Sutton
For students, families, teachers, and homeschoolers as they learn and teach math. NewtownsWindow.com offers math challenge excursions online, summer learning activities, and educational gifts and ideas. With suggestions for reinforcing concepts at home,
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 New York City HOLD National  Elizabeth Carson
This advocacy organization's mission begins: "The performance of American students in mathematics is mediocre at best. Reform efforts over the past two decades have only made matters worse. We are advocates for school mathematics education reforms that
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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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 Next in Line  Ivars Peterson (MathLand)
Number sequences present all sorts of intriguing puzzles and patterns. Consider the sequence of counting numbers: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 .... Now, take out every second number, leaving: 1 3 5 7 9 11 13 15 ...; form the cumulative totals
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 Nifty Ideas: HandsOn Math Lab  Fran Endicott Armstrong
Rationales, lesson plans, notes, and sample materials for first quadrant graph games (graph hide and seek and collinear game) and skip counting and multiples activities (counting people and hands and fingers, and arithmetic calculator). The triangular
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 The Nine Planets, a Multimedia Tour of the Solar System  Bill Arnett
An overview of the history, mythology, and current scientific knowledge, with descriptions and data, of each of the planets and moons in our solar system. Each page has text and images, some have sounds and movies, and most provide references to additional
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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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 Nix the Tricks
Problematic vocabulary, notation, mnemonics, and other shortcuts reconsidered and "fixed" by teachers who "want to put a stop to the superficial, cheap tricks that have infected the teaching and learning of math." Submit your own trick, or debate and
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 Noetic Learning: Your Online Math Learning Center  Li Kelty, Noetic Learning, LLC
Offers a worksheet generator with online publishing capability, in the basic operations and money. See also Noetic Learning's online programs for gifted elementary students, summer enrichment and learning retention, and math contests. Free samples of
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 NonEnglish Math Resources  Math Forum
Students and teachers with NonEnglish language needs will find mathematics and math education Web sites organized by category for the following languages: Spanish, French, German.
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 Nonpartisan Education Review
The Nonpartisan Education Review provides a forum for those interested in education issues but put off by the education policy groups affiliated with the political parties. The groupo aims to make a difference by remaining nonaligned and nonpartisan.
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 The Noon Observation Project  Cathie Godwin, Kathleen Smith; College of Education, Univ. of Illinois at UrbanaChampaign
A joint effort among interested schools worldwide in accurately estimating the circumference of the earth. How to compute local noon at your location; the original 1999 form for submitting Noon Observations; an explanation of the formulas for computing
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 Northeast Regional Climate Center (NRCC)  Department of Soil, Crop and Atmospheric Sciences, Cornell University
The NRCC serves a 12state region that includes Connecticut, Delaware, Massachusetts, Maryland, Maine, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, and West Virginia, working to acquire and disseminate accurate, uptodate
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 Northwest Math Conference
An annual conference that "brings together mathematics teachers from all levels of primary, secondary, and undergraduate education to learn and share about mathematics and pedagogy." Find information on Northwest Math Conference (NWMC) programs, speakers,
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 Northwest Regional Educational Laboratory (NWREL)
A searchable site whose mission is to improve educational results for children, youth, and adults by providing research and development assistance in delivering equitable, highquality educational programs. NWREL provides research and development assistance
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 Not So Humble Pi  Craig Snodgrass
Humorous wall calendars that run from March to March, in honor of Pi Day, 3/14. Also, buy greeting cards that celebrate pi, and submit your own πku poetry. A portion of all orders goes to the Juvenile Diabetes Research Foundation.
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 Nova Scotia Software Evaluation Reports  Ednet
This evaluation of microcomputer software and multimedia products is coordinated by the Program Branch of the Nova Scotia Department of Education and Culture. The software reviews are published to assist educators in selecting software for use in public
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 NOVA Teachers: Featured Teacher  PBS
Teachers' featured stories of a lesson plan using one of the NOVA films. Lesson titles include: Students Inclined to Study Galileo, Exploring Research Bias, Placing Value on Maya Math, Teaching with Trebuchets, Bridges Form Foundation for Geometry Unit,
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 NRICH Maths, the Online Maths Club  Univ. of Cambridge, UK
A project that aims to establish a permanent national centre for curriculum enrichment to provide mathematical learning support for very able children of all ages. The learning and enjoyment of mathematics are promoted through an Internet Newsletter and
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 Numbaland  Lomas, Derek; Ching, Dixie; and Sun, Jeanine
Four simple Shockwave Flash games for developing a sense of number concepts: Battleship Numberline (estimating position on the number line), Block Basher (in the style of Tetris, drop blocks of the same color to knock each other out by estimating positions
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 Number and Word Puzzles  Ken Egan
Number and word puzzles, including Digicross, in worksheet and interactive (Java) format.
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 Number Aquarium  France & Associates
A way to help children learn the basics of writing and counting their numbers. Number Aquarium integrates sound and animation to teach number formation and recognition to early education students; animals of the sea show how to draw the numbers. Requires
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 Number Bases  Math Forum, Ask Dr. Math FAQ
What is base 10? Binary? Hexadecimal? How can you convert from one base to another?
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 The Number Catcher  INSERMCEA Cognitive Neuroimaging Unit
"Play. Count. Calculate." Learn basic concepts of number and arithmetic, such as concrete sets, digits, number words, base 10, and the logic of multidigit numbers. INSERMCEA Cognitive Neuroimaging Unit also created The Number Race.
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 Number Facts  Math Forum, Ask Dr. Math Common Question
A list of sites with facts, curiosities, trivia, and other information about individual numbers.
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 A Number Game  Zusheng Rao
Imagine this interesting game. Given 9 numbers (1,2,3,4,5,6,7,8,9), can you make a number like 1997 by using these numbers and +  * operations without changing their positions? This applet can tell you: put 9 in the column corresponding to "Max Number"
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 Number Glossary  Math Forum, Ask Dr. Math FAQ
What are abundant, amicable, deficient, figurate, happy, narcissistic, palindromic, perfect, polygonal, proper divisors, semiperfect, sociable, square, tetrahedral, triangular, and weird numbers?
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 Number Guessing  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Think of a number and answer a few questions posed by the computer. After a while the compter will announce your number. The trick is based on a special card design whose variations appeared more than a hundred years ago.
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 The Number Gym  Melvyn Rust, Number Gym Software
Free, interactive, Shockwave Flash numeracy software. These activities are particularly suitable for use with Interactive Whiteboards. There is a full version for sale, as well. Currently this software comprises: 1. Number line activites; 2. Number Grid
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 Numbering Systems and Place Values  John Knoderer, The MazeMan
Primarily a page about large numbers. Topics covered include: Place Values, ones up to trillions; Place Values, tenths down to trillionths; the American Numbering System; Googol and Googolplex; and the British Numbering System.
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 Numberland  Count On
Number facts and trivia for the numbers 1100. Click on a number from a square to go to a page about that number.
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 numbermaze  Mike Reilly & Jenks Norwalk
A Sudokulike maze puzzle that uses the number pattern from a clock face, one through twelve. Link these numbers in either direction – clockwise or counterclockwise – through the maze to solve the puzzle. Read complete rules, path strategy, hints, and
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 NumberNut.com  Andrew Rader Studios
Introductions to shapes and colors, counting numbers, addition, subtraction, multiplication, division, order of operations, dates and times, number types, fractions, decimals, percents, estimation and rounding, ratios, money math, factors, graphs and
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 Number Of
"You ask, we count": NumberOf.net answers questions that begin "How many ...?" All entries appear in paragraph form that follow a stock template, and link to references. Science entries have enumerated on numbers of breaths per minute, edges on a cylinder,
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 A Number of Things  Karyn Vogel
Blog where a K5 Math Coach in Burlington (VT) "shares ideas and resources related to mathematics and education." Posts, which date back to October, 2011, have included "Math and Image," "A new way of problemsolving," "Sugar and Ice book review," "Plus
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 Number Patterns  Harvey Heinz
A brief description of why mathematics is often called the science of pattern followed by examples of a variety of magic squares of various types; examples of orders 5 to 12d magic stars, and selections from Heinz's collection of over 400 number patterns
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 Number Puzzles  Ken and Dima Boone
Arithmetic puzzles along with hints and answers include "Laying Eggs," "Four Fours Into Seven," "Target Number 278," "Inserting Plus Signs," and "How Many Legs?" and "What's My Number?"
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 NumberQuotes  Steve Duncan
Enter some digits, and get data containing that number to help put that figure in perspective  or to just associate it with a fun factoid. Learn what cities have your number as a population, or about its purchasing power in dollars. Many fivedigit
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