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  1. NASA Smart Skies FlyBy Math - NASA Airspace Systems: Ames Research Center
    Distance-Rate-Time Problems in Air Traffic Control for Grades 5-9. Six rich, standards-linked problems, each with student worksheets and teacher guides and related materials. Each features a guided experiment for students to carry out. Worksheets provide ...more>>

  2. National Library of Virtual Manipulatives for Interactive Mathematics (NLVM) - Cannon et al., Principal Investigators; Utah State University
    Java applets and other virtual manipulatives cover mathematics appropriate to grades K-12, with a special emphasis on K-8. Browse by grade band or by math topic: number and operations, algebra, geometry, measurement, and data analysis and probability. ...more>>

  3. Native American Geometry - Chris Hardaker
    A physical, proportional geometry that originates from the simple circle. A growing body of architectural and iconographic evidence suggests this geometry was a relatively common tradition and has been practiced for at least 2000 years. The site is divided ...more>>

  4. Navworld - Joseph Portney
    A center for the art and science of navigation, providing navigational "cerebrations," famous historical accounts, interviews and biographies. See Earthshapes, different ideas of what the earth would look like if it were one of 12 different shapes (physical ...more>>

  5. NCTM Standards (Standards 2000) - National Council of Teachers of Mathematics (NCTM)
    NCTM's Principles and Standards for School Mathematics is the compilation of the lessons learned and experiences gained over the years since the 1989 Standards were released. The site features include: an online version of the Standards (including illustrations, ...more>>

  6. NECTAR Foundation: New Era Classroom, Technology and Research
    A non-profit foundation specialising in the development and marketing of educational software in the kindergarten to grade 12 program with a focus on mathematics software programs. It also develops and markets print, video, and audio materials for students ...more>>

  7. Nesting Software: PLUS (PaneL Utilization Software)
    Software for reducing scrap and generating optimum layouts for cutting in sheet metal layout, fabrication, glass, building panel, and woodworking industries. Samples and free demo downloads. ...more>>

  8. 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 ...more>>

  9. Neutral and Non-Euclidean Geometries - David C. Royster; University of North Carolina at Charlotte
    Course notes that include: Origins of geometry; spherical geometry; logic and the axiomatic method; proof; Euclid's mathematical system; incidence geometry; betweenness axioms; congruence theorems; axioms of continuity; neutral geometry; theorems of continuity; ...more>>

  10. 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 ...more>>

  11. 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 1-6 of the New Zealand mathematics curriculum and include probability, statistics, measurement, and geometry. ...more>>

  12. Nils Ahbel - Deerfield Academy, Deerfield, MA
    Access Ahbel's Blackboard courses as a guest to preview his teaching resources and download Excel files in algebra, functions, statistics, and trigonometry. ...more>>

  13. The Noon Observation Project - Cathie Godwin, Kathleen Smith; College of Education, Univ. of Illinois at Urbana-Champaign
    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 ...more>>

  14. The North Carolina State High School Mathematics Contest - John Goebel
    Download PDFs of recent contest questions and solutions, and see test statistics and item analysis. Read brief and detailed histories of the contest, rules, and more. The State Mathematics Contest was initiated in 1979 to provide state level competition ...more>>

  15. Not Just Sums - Emily Hillier, Not Just Sums
    Teaching and learning resources from the U.K. Learn about the product range and educational philosophy, and try sample resources, a daily starter activity, and online games. ...more>>

  16. 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, ...more>>

  17. 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 ...more>>

  18. The Nuffield Foundation
    Math teaching and learning resources include freely downloadable Free-standing Mathematics Activities (FSMAs) and Applying Mathematical Processes (AMP) activities, a mix of investigations and practical explorations. The Nuffield Foundation works to improve ...more>>

  19. Numb3rs Math Activities - Cornell Department of Mathematics
    Notes and activities on the mathematics behind each CBS television broadcast of the FBI crime series NUMB3RS, from the pilot episode through season five: Uncertainty Principle, Sniper Zero, Dirty Bomb, Assassin, Toxin, Backscatter, Two Daughters, Burn ...more>>

  20. 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 ...more>>

  21. Number and Geometry - James Garner
    An essay on the historical relationship between numbers and geometry. ...more>>

  22. Number Loving - Laura Rees-Hughes and Sharon Derbyshire
    Freely downloadable PDFs, Microsoft Word documents, and PowerPoint presentations, organized by UK key stages, strands, and topics. The Number Loving blog offers new approaches for teaching maths and tips for classroom makeovers. Posts, which date back ...more>>

  23. 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 ...more>>

  24. Number Strings - Imm, Kara; Lambert, Rachel; et al.
    A place to find new strings, post strings, get feedback on design or number choice, and discuss the pedagogy of number strings, a classroom routine based on "sets of related math problems, crafted to support students to construct big ideas about mathematics ...more>>

  25. Numeracy Works - David Hartmann, Numeracy Works LLC
    Numeracy Works is a commercial software company which sells Tabula, a new tool for math education. Use Tabula to create, construct, cut, tape, fold, and transform. Make fold patterns, tiling patterns, tessellations, and perspective drawings. Also on ...more>>

  26. Numerical Integration: Accumulating Rates of Change - Geometry Center
    The fundamental theorem of calculus tells us that if we know the rate of change of some quantity, then adding up (or integrating) the rate of change over some interval will give the total change in that quantity over the same interval. But often scientists ...more>>

  27. Nummòlt - Maurici Carbó Jordi
    Java applets: an area "workshop," which explains area and division by converting numbers in area units; an architect's toy blocks, with gravity; connecting and programming elementary logic (in the form of pipes with light bulbs signifying true sentences); ...more>>

  28. The Official Scoring Site of the International Mathematical Olympiad 2001 - Wolfram Research
    The IMO 2001 competition, for students under the age of 20 who have had no postsecondary-school education, was held July 1-14, 2001, in Washington, DC, USA. Each country represented is allowed up to six participants. This site records scores and supplies ...more>>

  29. Olimpíada Brasileira de Matemática - Sociedade Brasileira de Matemática (SBM)
    The Olimpíada Brasileira de Matemática (OBM) is a competition open to all students enrolled in Brazil's fundamental or middle studies. Browse or download archived exam problems and solutions dating back to 1997. Read news about olympiads, or the journal ...more>>

  30. Olimpiada Matemática Española - C. Sánchez-Rubio
    Convocatoria XXXV Olimpiada (Curso 1998/99); Comisión de la Olimpiada Matemática Española; Información para alumnos y profesores; Problemas de las últimas Olimpiadas (Fase nacional); Material para preparación; ...more>>

  31. Oliver Byrne's edition of Euclid - Digital Mathematics Archive, Univ. of British Columbia
    An unusual and attractive edition of Euclid was published in 1847 in England, edited by an otherwise unknown mathematician named Oliver Byrne. It covers the first 6 books of Euclid, which range through most of elementary plane geometry and the theory ...more>>

  32. One, Two.. Infinity - Marian Small
    PDFs of presentations from the professional development consultant and author of Making Math Meaningful to Canadian Students K-8, More Good Questions: Great Ways to Differentiate Secondary Mathematics Instruction (9 - 12), Eyes on Math: A Visual Approach ...more>>

  33. Online Catalog - Creative Publications
    Educational publishers of MathLand (K-6) and Mathscape (6-8) curricula, supplemental resources, and manipulatives. Teachers' lounge, professional development information, workshops and conferences, and product and ordering information. ...more>>

  34. Online Class: Internet Education Projects - TBT International, Inc.
    A model project to show teachers how to integrate technology into the classroom. Designed so that live, interactive content will draw out technical skills. Subscribe by classroom to receive a printed teachers' resource guide; materials delivered free ...more>>

  35. Onlineindiaeducation - Atul Mittal
    Page after page of questions with links to view answers and explanations: aptitude (area, series, "problems on trains," boats and streams, odd man out, and more), puzzles (sudoku, number, logical, clock, etc.), and reasoning (cause and effect, arithmetic, ...more>>

  36. ONLINE MATH: An Internet Mathematics Program - Larson, Neptune, Falvo; TDLC, a Division of Larson Texts, Inc.
    ONLINE MATH is a mathematics tutorial instruction program available through the Internet. Designed to help students improve their math skills in a self-paced environment, the program is mastery based, customizable, and includes readiness tests, cumulative ...more>>

  37. Online Math Applications - Leung, Jiang, Jiang, Chiu, Klopfer, Chiu; ThinkQuest Junior
    Activities, examples, problems, and online quizzes about math applied to real world situations in investing (a stock market simulation game), music (classical MIDI files), history (biographies and anecdotes), science (astronomy, computers, 'math in the ...more>>

  38. Online Math Center - Whatcom Community College, Bellingham, WA
    Resources for mathematics students and teachers, including answers to Frequently Asked Questions and online Live Math applications demonstrating algebra, calculus, and linear algebra topics. ...more>>

  39. Online Math Education - Yordan Petrov Petrov
    Math tutorials and quizzes, with some math history information as well. Includes a discussion forum. Available in English or Bulgarian. ...more>>

  40. Online Math Help for All - Ramachandran Seerangan
    Primers and problems, a math dictionary, worksheets organized by grade and concept, and more. ...more>>

  41. Online Math Help & Learning Resources
    Learn basic concepts behind arithmetic, algebra, geometry, statistics and set theory. Includes some SAT test preparation help, math games, math worksheets, math riddles, math quotes, math mnemonics and math trivia. ...more>>

  42. The Online Test Page - Elias Saab
    Math and vocabulary drills, including MathCOUNTS, SAT, ACT, and Missouri MMPT questions, as well as links to relevant sites. ...more>>

  43. On Motivation and Understanding - Cut the Knot!, Alexander Bogomolny
    Fourth in a series of columns that draw on Frank Morley's fundamental paper On the Metric Geometry of the Plane n-Line - dealing with what amounts to his proof of the Trisector Theorem. Bogomolny outlines Morley's reasoning first and then supplies necessary ...more>>

  44. OOG: the Object Orientation Game - MCM Productions
    MCM Productions' first publicly released software application. This 4-in-1 tiling puzzle game for the MS-Windows environment allows players to test their problem solving ability with over 300 puzzles, including Tangrams, Pentominoes, Hexagons and Polyominoes. ...more>>

  45. Open-Ended Assessment in Math - Cooney, Thomas J.; Sanchez, Wendy B.; Leatham, Keith; and Mewborn, Denise S.
    Over 450 open-ended, field-tested assessment items, distributed more or less equally among elementary, middle school, and high school grade levels. The questions relate to five major content areas, based on the NCTM Standards: number and operation; probability ...more>>

  46. Open-Ended Math Problems - Gwenn Holtz and Mary Lee Malen, Levering School and the Franklin Institute
    An eight-month slate of open-ended 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 ...more>>

  47. Open Middle - Johnson, Nanette; and Kaplinsky, Robert
    "Open middle" problems, hints, and answers, all aligned to the Common Core State Standards (CCSS). Introduced by Dan Meyer, these kinds of math challenges have a "closed beginning," meaning that they all start with the same initial problem; a "closed ...more>>

  48. OPenn - University of Pennsylvania Libraries
    High-resolution archival images of manuscripts from the University of Pennsylvania Libraries and other institutions, along with machine-readable descriptions and technical metadata. Digitized cultural heritage materials on mathematics include "Treatise ...more>>

  49. Open Problems for Undergraduates (DIMACS) - Robert Hochberg, Center for Discrete Mathematics and Theoretical Computer Science, Rutgers Univ.
    A collection of open problems in Discrete Mathematics in the areas of Graph Theory; Combinatorial Geometry; Geometry/Number theory; and Venn Diagrams, currently being researched by members of the DIMACS community. These problems are easily stated, require ...more>>

  50. Open Problems - Jeff Erickson
    Open problems, mostly in geometry, including folding, combinatorial, and algorithmic problems. Contents include: Existence Problems: Does Object X exist? Combinatorial Problems: How complex is Object X? Algorithmic Problems: How fast can Problem X be ...more>>

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