 Museu Nacional de História Natural e Ciência  Universidade de Lisboa
"Apoiando a investigação e o ensino nas áreas da zoologia e antropologia, da botânica, da mineralogia e geologia, e das demais ciências naturais, e estimulando o estudo e a divulgação da história das
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 Music and Mathematics  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about music and mathematics, and pitches, tones, and musical scales, in particular
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 Music and Probability  Lorraine Fielding
A middle school's music project based on the Mozart Musical Dice Game, invented by Mozart around 1770, in which dice rolls generate twelvetone or diatonic minuets. Links to a web version of Mozart's game, using MIDI technology; and movie, audio files
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 Music by John Greschak  John Greschak
Platonic Dice: Dodecahedron, Platonic Dice: Hexahedron, Pentominoes, The Tower of Hanoi, and other music compositions based upon the mathematical properties of various objects. Listen with RealAudio or Midi.
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 Music through the Curriculum  Phil Tulga
Developers of math programs such as "Math and Music," which teaches students how to "hear" math (what does a fraction sound like? how about a shape?); and "Math, Science and Sound," an assembly and family night program that connects thunder, volcanoes,
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 Musings from Mrs. Galvan  Regan Galvan
Blog of "thoughts on teaching math and on promoting social, emotional wellness among my students and colleagues" by a selfdescribed fan of students creating digital portfolios in math. Posts, which date back to February, 2013, have included "Geometry
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 MVC (Metroplex Voice Computing)
Hands and mousefree arithmetic and math programs for the physically impaired student who cannot use the keyboard. Voiced mathematics products include: ArithmeticTalk (grades 15, for addition, subtraction, division, and multiplication); MathTalk (grades
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 My Calculator Rental  Ben Burnett
Lender of graphing calculators. Rent for as long or as little as you like for a monthly fee. Select from the TI83 Plus, TI84 Plus, TI86, and TI89 Titanium calculators. mycalcrental.com also provides downloads of user manuals.
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 My Dear Aunt Sally  Ron Larson
The game "My Dear Aunt Sally" reinforces number sense, from single operations on whole numbers to multiple operations on rationals. Features hints; audio in English or Spanish; hundreds of difficulty levels; animations of Aunt Sally and her animal friends;
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 MyiMaths  MyiMaths Ltd
A teaching resource comprised of hundreds of interactive lessons, each with dynamically generated activities, games, tools, and questions. See samples and reviews before purchasing a subscription.
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 My Magic Square  Michael Dormann
Enter a number from 23 to 100, then press the calculate button to see a completed 4x4 magic square, of which any row, column, diagonal, the center square, and the four corners each sums to the number entered.
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 MyMaths  Alan Jackson
A feebased repository of lesson plans, including "boosters" specifically for UK Year 9, "Grade D to C," and higherlevel GCSE students. A subscription also provides for MyMaths' class management system. Take a tour of the resources and sample lesson
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 MyMathTutor.com  Charles Patrick McKeague
A webbased eLearning resource that supplements traditional textbook and classroom learning. Before signing up for this feebased service, demo one of their RealPlayer video tutorials, which show how to solve math problems. Each lesson includes a practice
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 MY NASA DATA  NASA Langley Research Center
Webbased data, data analysis tools, and lesson plans. Mentoring and inquirY using NASA Data for Atmospheric and earth science for Teachers and Amateurs (MY NASA DATA) is a project to enable K12 teachers and students, as well as citizen scientists, to
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 My Speed Cubing Page  Jessica Fridrich
"Intended for those of you who can already solve [Rubik's] cube in a few minutes and want to get really fast." Content includes "20 years of speed cubing (a short historical narrative)," "Finger shortcuts," "Move algorithms to your subconsciousness,"
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 My Sports Pulse
My Sports Pulse™ is an educational game delivered via IVR, SMS/text messaging, and video messaging to mobile devices such as cell phones. Each message contains a sports themed question concerning aspects of math, science, and technology. You pay for using
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 Mystic Chaos: A Preliminary Report  Ivars Peterson (MathLand)
Billed as a fantasy adventure game, Chaos involves solving a mystery  or rather, a large number of little puzzles that supposedly add up to something bigger  starting from scratch. You have to figure out what the mystery is and how you as the player
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 My Virtual Reference Desk  Bob Drudge
Designed to be a onestop reference guide to all things Internet. You can search the Web, AP/Reuters, or DejaNews by keyword; find the weather by city or zip code; get stock quotes; follow links to sources of news, radio news, newspapers, TV news, magazines,
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 NACME Backs Me  National Action Council for Minorities in Engineering (NACME)
Meet engineering role models, find local and online resources, and connect to hundreds of engineering societies, universities and career sites. Designed for middle and high school students with an interest in math, science, engineering and technology,
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 NADE Math SPIN  National Association for Developmental Education's Special Professional Interest Network for those interested in teaching mathematics
A professional organization for developmental math professionals to interact and share with each other. The site features links to best practices in developmental mathematics, newsletters, email discussion group, and conferences. Also available from
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 Names for features of symmetrical patterns (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
Names for features that may occur in symmetrical patterns. To each such feature of the pattern, there is a corresponding feature of the quotient orbifold. Mirrors and mirror strings; mirror boundaries; gyration points; cone points.
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 Names for Numbers  Ivars Peterson (MathTrek)
Once someone discovers an interesting pattern or type of behavior, those particular numbers are likely to earn a collective name. So we have perfect numbers, amicable numbers, lucky numbers, Mersenne numbers, Fermat numbers, Fibonacci numbers, Keith numbers,
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 Names for symmetry groups and orbifolds (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
A symmetry group is the collection of all symmetry operations of a pattern. We give the same names to symmetry groups as to the corresponding quotient orbifolds, regarding every orbifold as obtained from a sphere by adding conepoints, mirror boundaries,
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 Naming Polygons and Polyhedra  Math Forum, Ask Dr. Math FAQ
What do you call an 11sided polygon? A 14sided polygon? Is there a list of names of polygons? What about polyhedra?
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 Napier Bones  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A Java simulation of the Napier bones, simple device for multiplying numbers, here used to demonstrate multiplying in bases other than ten.
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 Napoleon Points  Clark Kimberling
The first and second Napoleon points, described and illustrated, with a reference.
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 NASA Education  National Aeronautics and Space Administration (NASA)
The two main goals of NASA's education program are to "inspire and motivate students to pursue careers in science, technology, engineering, and mathematics" by supporting education in the Nation's schools; and to "engage the public in shaping and sharing
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 NASA Educator Astronaut Program
NASA's Educator Astronaut Program site invites visitors to 'see learning in a whole new light'. Students, educators, and parents can join the Earth Crew and interact with NASA in groundbased projects and missions, meet NASA astronauts and employees,
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 NASA Explorer Schools  National Aeronautics and Space Administration (NASA)
Each spring, NASA establishes a threeyear partnership with 50 new NASA Explorer School teams, consisting of teachers and education administrators from diverse communities across the country. NASA invites the selected teams to work with education specialists
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 NASA KIDS  Science @ NASA
Puzzles, games, and science stories for students in grades 58, from the U.S. National Aeronautics and Space Administration. Students can earn certificates by joining the NASA KIDS Club and completing its learning activities. Mathematics teachers can
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 NASA Podcasting  National Aeronautics and Space Administration (NASA)
Tap into the latest networking technology to get updates from NASA: NASACast, audio and video podcasts, NASA on iTunes, other NASA podcasts, podcasting resources and directories.
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 NASA Smart Skies FlyBy Math  NASA Airspace Systems: Ames Research Center
DistanceRateTime Problems in Air Traffic Control for Grades 59. Six rich, standardslinked problems, each with student worksheets and teacher guides and related materials. Each features a guided experiment for students to carry out. Worksheets provide
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 NASA Spacelink  National Aeronautics and Space Administration
An aeronautics and space resource for educators. Math curriculum support instructional materials range from exploring meteorite mysteries and the mathematics of microgravity to the mathematics of space and rocketry; and also list related NASA Internet
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 Nathan Selikoff
Works, publications, blog, and more from a "fine artist playing at the intersection of interactivity, math, and code." Works have included "Beautiful Chaos" (interactive software art), "Intersect"
(a public art installation), "Four Dimensions" (a realtime
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 National Aeronautics and Space Administration (NASA)
Strategic Enterprises: Office of AeroSpace Technology; Human Exploration and Development of Space; Earth Science; Space Science. In particular, see NASA's resources for educators and for students, formerly organized under their Spacelink project. Links
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 National Alliance of State Science and Mathematics Coalitions
The National Alliance of State Science and Mathematics Coalitions (NASSMC) establishes, and provides services to, state coalitions dedicated to improving U.S. mathematics, science, and technology education (MSTE) for all students.
A nonprofit association,
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 National Association of Math Circles  Mathematical Sciences Research Institute
In a Math Circle, students and mathematical professionals gather informally to work on interesting problems or topics in mathematics. The goal of this education enrichment is to get students excited about mathematics, giving them a setting (usually after
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 National Center for Education Statistics (NCES)  U.S. Department of Education
The primary federal entity for collecting and analyzing data related to education in the United States and other nations. NCES collects, collates, analyzes, and reports complete statistics on the condition of American education; conducts and publishes
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 National Center for Research on Teacher Learning (NCRTL)  National Center for Research on Teacher Learning (NCRTL)
Based in the College of Education at Michigan State University, NCRTL conducts research in teacher education. Brochures and publications (special reports, craft papers, research reports, technical series, issue papers, conference series, and video packages)
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 National Center for Technology Planning (NCTP)  Dr. Larry S. Anderson, Founder/Director
A clearinghouse for the exchange of many types of information related to technology planning: school district technology plans available for downloading via a computer network; technology planning aids (checklists, brochures, sample planning forms, PR
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 National Center to Improve Practice (NCIP)  Education Development Center, Inc. (EDC)
The National Center to Improve Practice in Special Education Through Technology, Media and Materials promotes the effective use of technology to enhance educational outcomes for students with sensory, cognitive, physical and social/emotional disabilities.
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 National Centre for Excellence in Mathematics and Science Teaching and Learning  University of Limerick
Ireland's NCEMSTL researches, coordinates, supports, develops and implements programmes to enhance Irish science and mathematics teaching and learning at all levels. Read Centre publications and reports; learn about its courses and other events. Register
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 The National Centre for Excellence in the Teaching of Mathematics  Tribal Education Ltd.
The UK's National Centre for Excellence in the Teaching of Mathematics (NCETM) aims to meet the professional aspirations and needs of all teachers of mathematics and realise the potential of learners through a sustainable national infrastructure for mathematicsspecific
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 The National Clearinghouse for English Language Acquisition (NCELA)
Online library and bibliographic database; technical, language education, and classroom materials links; conferences and meetings calendar; discussion group; Newsline (weekly bulletin); and state resource listings. Read classroom centered practices for
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 National Commission on Mathematics and Science Teaching for the 21st Century  U.S. Department of Education
A Glenn Commission plan to ensure that every American student receives excellent instruction in math and science  instruction critical to maintaining the U.S. edge in the competitive global economy. The report sets three goals: to establish an ongoing
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 National Council for Accreditation of Teacher Education (NCATE)
The professional accrediting organization for schools, colleges, and departments of education in the United States. See what institutions say about NCATE, and read testimony to the Senate Committee on Labor and Human Resources about NCATE's message and
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 National Council of Supervisors of Mathematics (NCSM)
A resource site for those interested in leadership in mathematics education. The site lists meetings and conferences, membership information and how to subscribe to the NCSM mailing list, publications, operations, information about the summer Leadership
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 National Council of Teachers of Mathematics (NCTM)
Founded in 1920 and now the largest mathematics education organization in the world, this nonprofit professional association headquartered in Reston, Virginia is composed of more than 120,000 teachers, educators, and other professionals. Its purpose is
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 National Foundation for the Improvement of Education (NFIE)  National Education Association
NFIE provides teachers, other school employees, and higher education faculty and staff with opportunities to develop and test solutions to the challenges facing American public education through grants, technical assistance, professional collaboration,
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 National Girls Collaborative Project  EdLab Group
The National Girls Collaborative Project (NGCP) intends to bring together organizations throughout the United States that focus on encouraging girls to pursue careers in science, technology, engineering, and mathematics (STEM). On the site, you can: find
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