 False Proofs, Classic Fallacies  Math Forum, Ask Dr. Math FAQ
What's wrong with proofs that say 1+1 = 1, or 2 = 1?
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 Famdays
A famday is a day on which the combined ages of family members add up to a whole number of years  in a sense, a family birthday, a reason for a celebration that contributes to strengthening family ties. Students can compute famdays for their families
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 Family Finance  Utah State University Family Finance
PowerPoint presentations for selfguided study: financial attitudes, values & goals; budgeting; creating your financial information binder; and how to budget your money. Other resources from the Utah State University Cooperative Extension agency include
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 Family Math Classes  EQUALS, Lawrence Hall of Science, University of California, Berkeley, CA
A program to encourage underrepresented groups (especially girls and minority students) to enter careers that use mathematics. A Family Math course lasts approximately 6 weeks. At every session, approximately 25 people (counting parents and children)
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 Family or Child First?  Math Forum, a Classic Problem from the Ask Dr. Math FAQ
In a twochild family, one child is a boy. What is the probability that the other child is a girl? Discusses the difference between choosing the child first and choosing the family first, and why they're mathematically different.
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 Family Village School  Waisman Center, University of WisconsinMadison
Resources related to education for families with a child who has disabilities, plus additional resources JUST FOR KIDS. Pages with links to sites for: Advocacy and Public Policy; Assistive Technology for Students with Disabilities; "Disability Awareness"
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 Famous Paradoxes  Isaac Reed
Zeno's Paradox and Cantor's Infinities.
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 The FANS Project  The New Jersey Mathematics Coalition
"Families Achieving the New Standards" in Math, Science and Technology Education is a parent outreach project, with the goals of informing parents about the New Jersey standards in mathematics, science, and technology; involving parents in helping their
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 Fascinating Folds: Origami
A premier supplier for Origami and the Paper Arts with books, papers, and related products. Online ordering of supplies is available. Origami and Paper Products for sale include books, papers, videos, CDs, related products (cards, bookmarks, tshirts),
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 Fast Facts (Math On Line)  D. Kell; Mercer County Community College
Link listings for math concepts, from whole numbers and fractions to advanced equations, logic, and probability.
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 Fast Food Combinations  Math Forum, Ask Dr. Math FAQ
How many possible combinations can be made from a special menu of eight items?
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 Fermi Questions  Sheila Talamo
Fermi questions emphasize estimation, numerical reasoning, communicating in mathematics, and questioning skills. Students often believe that "word problems" have one exact answer and that the answer is derived in a unique manner. Fermi questions encourage
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 Fibonacci Numbers and Nature  Ron Knott
Fibonacci and his original problem about rabbits that gave the series its name; the family trees of bees; the golden ratio and the Fibonacci series; the Fibonacci Spiral and sea shell shapes; branching plants; flower petal and seedheads; and the leaf
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 Fibonacci Numbers and the Golden Section  Ron Knott
Information about the Fibonacci series, including a brief biography of Fibonacci, the numerical properties of the series, and the ways it is manifested in nature. Fibonacci numbers are closely related to the golden ratio (also known as the golden mean,
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 The Fibonacci Numbers, Pineapples, Sunflowers, and the Golden Mean  Don Cohen (The Mathman)
Mathematics from a Pineapple: Infinite sequences, limit of a sequence, ratios, fractions, and decimals. Also Looking at a Regular Pentagon. Sample problems with some answers from Chapter 7 of Don Cohen's worksheet book.
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 The Fibonacci Series  Matt Anderson, Jeffrey Frazier, and Kris Popendorf; ThinkQuest 1999
The Fibonacci Series is deceptively simple, but its ramifications and applications are many. Learn more about the Fibonacci Series itself: an introduction, the rabbit problem, Binet's formula, the successor formula (given only one term in the Fibonacci
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 A Fictional History of Place Value (SMILE)  Bette B. Jarrow, Goudy Elementary School
A lesson designed to teach students to rename a two or threedigit number in several different ways, including expanded form; and to perform addition and subtraction with the application of regrouping and the use of zero as a place holder. From the Arithmetic
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 Figure Five Frenzy  ridiculopathy.com
Create an arithmetic expression equal to the target number using the four basic operations, grouping parentheses, and the five number cards dealt to you. Play in arcade (against a timer), multiplayer, or solitaire modes. Requires the Flash plugin.
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 Figure This! Math Challenges for Families  National Council of Teachers of Mathematics (NCTM)
Elementarylevel problems with hints, information about when and why answers matter in the real world, suggestions for getting started, and answers with explanations. A Challenge Index lists problems by topic. Examples include: Line Up! (How long do you
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 Financial Literacy Math Quizzes  HowToSaveMoney.me
Quizzes for practicing addition and subtraction of dollar and coin amounts, presented with pictures of US currency or as numerical expressions. "Grade My Quiz" or generate new problems with the click of a button. The site also offers finance calculators,
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 Finding Common Ground in K12 Mathematics Education  Mathematical Association of America
"Starting point" documents, designed to advance the discourse about how to improve K12 mathematics teaching and learning, that emerged from MAAconvened pilot meetings between mathematicians and mathematics educators thought to be strongly aligned with
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 Finding Prime Factors  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about finding prime factors, along with divisibility rules for some prime numbers.
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 FI Projects and Activities (Freudenthal Institute)  Utrecht University, the Netherlands
The FI is the National Expertise Center for Mathematics Education in primary and secondary education. This page provides a list of FI projects and activities, with links to more information. Sample subjects: Spherical geometry; Technology, mathematics,
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 First Day of School  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: What do you do on the first day of school?
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 First Year Suggestions  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: Can you give me some helpful suggestions for getting through my first year of teaching?
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 Flags  Jim Croft
Links to information about and images of flags of the world: National Flags, International Maritime Signal Flags, Motor Racing Flags, the Semaphore Flag Signaling System, and others, good for exploring symmetry in flag design.
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 Flash Activities  Quincy Brown
Quincy Brown, a Post Baccalaureate PhD candidate in Computer Science at Drexel University, shares these Flash Activities that she developed with Annie Fetter, Math Forum staffer, and tested in a second grade classroom in Philadelphia. The five levels
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 Flashcards (A+ Math)
Java and nonJava homeworkhelper flashcards for practicing: Java (with answers and with or without sound): addition, subtraction, multiplication, division, square roots, and rounding; nonJava: addition, subtraction, multiplication, division, order of
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 Flashcards for Kids  Education 4 Kids, Inc.
This customizable online application creates flashcards for drilling in addition, subtraction, multiplication, division, and addition and subtraction together, in simple or complex forms (only two numbers, or up to ten numbers), with choice of numbers
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 Flashcards & Worksheets  Math Forum, Ask Dr. Math Common Question
A short selection of sites that provide flashcards and worksheets for practicing basic operations and more.
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 FlashMaster: Mutliplication Tables / Math Facts  Charles Resor
A handheld electronic learning aid that helps children master "math facts" in each of the 4 arithmetic operations. Probably its most important feature is its ability to display, at a teacher or parent's convenience, detailed results of the last 9 learning
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 Flash Pegs  CleverMedia
Jump a peg over its adjacent neighbors to eliminate them until only one remains in this online version of the classic logic puzzle. Choose from nine starting configurations. Requires the Flash plugin.
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 Flatland: A romance of many dimensions  Edwin A. Abbott
A geometrical story about a twodimensional square who visits one and threedimensional worlds. Full text of the 2nd and revised edition, illustrated, 1884.
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 Florida EXPLORES!
Brings the NOAA Direct Readout Satellite Ground Station Program into Florida's K12 Classrooms. Precipitation summary, Atlantic hurricane season, satellite imagery, weather observations and model products, Data Center, teacher resource guide, GOES8 status
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 Florida Math
Online math community for teachers in kindergarten through 5th grade.
FloridaMath.com lists the expectations for each grade. The heart of the
site is the forum where teachers share their teaching ideas.
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 Florida Museum of Natural History (FLMNH)  Gainesville, FL, USA
The largest natural history museum in the southern United States, holding more than 16,000,000 specimens of mammals, birds, reptiles, amphibians, fishes, mollusks, butterflies, vertebrate and invertebrate fossils, recent and fossil plants, and associated
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 Focus on Mathematics  Department of Mathematics and Statistics, Boston University
Focus on Mathematics (FoM) seeks to "improve student achievement by providing mathematics teachers with the content knowledge and skills valuable in their profession." FoM programs have included math expos and math fairs of student research projects;
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 Fold Everything  National Geographic Society
See how paperfolding inspires the design of aircraft, stent grafts, and the packaging and transportation of telescope lenses in this overview of the history and future of origami. With downloadable instructions for folding a peacock, as well as an online
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 Football World Cup Simulation  Alan Parr, NRICH Maths
A dice game for students, simulating World Cup football (U.S.: soccer) play results, with varying degrees of complexity.
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 Forest Path  Maths  Vern Beaumont
Timed JavaScript practice activities in the four operations plus a number sequencing activity.
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 Formula Conversion  Mike Krone
Convert distances, lengths, areas, volumes, weights, masses, speeds, fuel economies, grade point averages (GPAs), and more, each with a formula showing unit changes and dimensional analysis.
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 for the learning of mathematics  FLM Publishing Association
for the learning of mathematics aims to stimulate reflection on mathematics education at all levels, and promote study of its practices and its theories: to generate productive discussion; to encourage enquiry and research; to promote criticism and evaluation
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 for the love of learning  Joe Bower
"Assessment is not a spreadsheet — it's a conversation." Describing his early teaching practice as "focused on power and control," Bower has followed three principles since 2004: "students should experience their successes and failures not as reward
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 Four 4's Puzzle  Ruth Carver, Math Forum
For students in grades 312 with a general knowledge of mathematics. Using four 4's and any operations, try to write equations that have the numbers from 0 to 100 as the answer. The answer for each number and the name of the first person to get it are
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 Fractal Art: Fractals produced with FRACTINT  Balraj Mehmi
A fractal art gallery containing fractals produced with the shareware program FRACTINT (downloadable from the site), with links to other sites with fractal pictures and to information on fractals and their origin.
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 Fractal Art Gallery  Fractal Image Wallpaper  Victoria B Brago
Extensive collection of fractal images which can be downloaded as desktop
wallpaper, technical explanation of fractal geometry, animated fractal
zooms.
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 A Fractal Art Gallery  Ken Keller
Exploring the boundary between creation and discovery  galleries of fractal images.
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 Fractal Gallery  Karen McCormack
Images, 19982000. Quaternions, Symmetric Icons, Flame Fractals, Secant City, Ikenaga's Garden, Fractals with Russell, Fractal Eggs, Filatura.
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 Fractals, Art, Pattern, Symmetry...  Clifford A. Pickover
Melding art, science, mathematics and other seemingly disparate areas of human endeavor. Links to detailed information on Pickover's books (of particular math interest are: Chaos and Fractals: A Computer Graphical Journey; The Loom of God; Fractal Horizons
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 Fractals Unleashed  Aronov, Radomyselskiy, Ming; ThinkQuest 1999
A tutorial on fractals, including types of fractals, famous fractals, applications, programs and downloads, links, references, and a Kids Zone. With Java applets and CGI programs, a gallery, and a fractal art contest. In English, Russian, and Ukrainian.
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