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  1. 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. ...more>>

  2. A Faulty Dissection - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    A deceptive dissection implemented in Java. Two different rearrangements of the same four plane pieces result in rectangles of different area. A very entertaining introduction into the subject of Fibonacci numbers. ...more>>

  3. Ferris Wheel - Jim King, University of Washington
    Physical devices can be modeled using dynamic geometry. A vital tool for moving objects around in the model are the isometries, or distance-preserving transformations. This model of a Ferris wheel provides a good example. A step-by-step description of ...more>>

  4. 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, ...more>>

  5. Figure This! Math Challenges for Families - National Council of Teachers of Mathematics (NCTM)
    Elementary-level 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 ...more>>

  6. Fill-It-In Outline Mathematics - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    A collection of outline solutions to various problems: word and logic problems, problems from arithmetic, number theory and geometry. Solutions are practically complete with a few essential pieces omitted and to be filled in by the student. ...more>>

  7. Finding Ways to Nguyen Students Over - Fawn Nguyen
    Nguyen blogs mostly about her teaching middle school math. Posts, which date back to November, 2011, have included "Teaching 101 -- How I Got Like This," "Puzzles and Brainteasers, Set 11," "Pi Day Activities," "Always Sometimes Never," "Using Excel for ...more>>

  8. Five Triangles mathematics blog
    This blog, which dates back to April, 2012, posts problems for middle and junior high school students. Topics have ranged from ratios and fractions to area and paths to quadratic equations and linear equations. ...more>>

  9. Five Twelve Thirteen - Dylan Kane
    Blog by an eighth grade math teacher in Boston. Posts, which date back to October, 2012, have included "Assessment & Rigor," "Pythagorean Triples Function," "Construct Viable Arguments and Critique the Reasoning of Others," "Guatemalan Sinkhole," "Problem ...more>>

  10. Flashcards (A+ Math)
    Java and non-Java homework-helper flashcards for practicing: Java (with answers and with or without sound): addition, subtraction, multiplication, division, square roots, and rounding; non-Java: addition, subtraction, multiplication, division, order of ...more>>

  11. Flatland: A romance of many dimensions - Edwin A. Abbott
    A geometrical story about a two-dimensional square who visits one- and three-dimensional worlds. Full text of the 2nd and revised edition, illustrated, 1884. ...more>>

  12. Flatland: the Movie - Flat World Productions, LLC
    This movie, available in DVD format, is based on Edwin A. Abbott's classic novel, Flatland: A Romance of Many Dimensions. Flatland is a world that exists entirely on a two-dimensional plane. All different kinds of shapes live, work, and play in this world. ...more>>

  13. Flight Angles Of Inclination (SMILE) - Marie C. Smith, Anthony Overton Elementary School
    A lesson designed to teach students to observe the flight of a glider; measure the distance flown from a given point; analyze the effect of a change of angle of inclination on the launch/flight of sling-launched gliders; collect data on distance flown ...more>>

  14. flippedmath.com - Bean, Spencer; Kelly, Timothy; Brust, Michael; and Sullivan, Corey
    These free Algebra, Algebra 2, and Geometry online courses for "flipped" classrooms offer video lessons, practice, application, and mastery check. Teachers for Department of Defense Education Activity (DoDEA) schools, "Algebros" Bean, Kelly, Brust, and ...more>>

  15. Flooble :: Perplexus - Lev Epshteyn
    A searchable, categorized collection of all sorts of puzzles, from simple logic questions and word tricks to in-depth math problems in probability and geometry. Users can talk to one another and collaborate on solutions, as well as post their own problems ...more>>

  16. 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. ...more>>

  17. FoldPlay
    Upload your photographs, print them out in FoldPlay's templates, then fold them into hex kaleidocycles, oct kaleidocycles, invertible cubes, and foldbooks. Also, instructions for folding nerdcatchers, sphericon pies, polygon puzzles, and other origami. ...more>>

  18. Forming, Measuring and Labeling Angles (SMILE) - Essie Lee May, May Community Academy
    A geometry lesson designed to teach students to form, measure, and label angles. From the Geometry and Measurement section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement. ...more>>

  19. Formulas - Math Forum; Ask Dr. Math FAQ
    Formulas for: Defining Geometric Figures (plane and solid figures, and a note on dimensions); Geometric Formulas (two- and three-dimensional figures: perimeter, area, volume, etc.); Analytic Geometry Formulas (one, two, and three dimensions: points, directions, ...more>>

  20. Forum Geometricorum - Paul Yiu, Editor; Department of Mathematical Sciences, Florida Atlantic University
    A journal on classical Euclidean geometry and related areas. The goal is to bring to a wide, international readership the beauty, elegance, and usefulness of elementary geometry, in research and in teaching. The journal focuses on concrete but challenging ...more>>

  21. Forum of Geometric Constructor - Yasuyuki Iijima, Aichi University of Education, Japan
    A dynamic geometry environment for DOS and Windows used in Japan - see the Tsukuba Journal of Educational Study in Mathematics. ...more>>

  22. Foundations of Greek Geometry - Michael Tirabassi; Tufts University
    A linked historical essay outlining the contributions of Thales, Pythagoras, and Plato to the study of geometry. ...more>>

  23. The Four Color Theorem - Robertson, Sanders, Seymour, Thomas; Georgia Tech
    A brief summary of a new proof of the Four Color Theorem, with a four-coloring algorithm found by Neil Robertson, Daniel P. Sanders, Paul Seymour and Robin Thomas, illustrated using a map of the United States. Contents: History; Why a new proof?; Outline ...more>>

  24. Fractals in Science: Simulations - Center for Polymer Studies, Boston University
    Hands-on activities, laboratory experiments, and interactive visualization programs that encourage students to explore how fundamentally random microscopic events can give rise to fractal macroscopic patterns. An image gallery and fractal related software ...more>>

  25. Freakonometrics - Arthur Charpentier
    Blog by a Montreal professor of actuarial science "addicted to R." Posts, which date back to March, 2007, have included "Dynamic dependence ordering for Archimedean copulas and distorted copulas," "Pricing catastrophe options in incomplete markets," "Estimation ...more>>

  26. Free Math Resources - Varsity Tutors
    Free math questions of the day, flashcards, more than a hundred diagnostic tests, and thousands of practice tests. A private tutoring service, Varsity Tutors also offers practice for standardized tests such as ACT, SAT, GRE, GMAT, LSAT, MCAT, ISEE, and ...more>>

  27. Free Math Tutoring - Doug Simms
    Online instructional videos, many accompanied by example and exercise sheets. Use of the site is free. ...more>>

  28. Free Math Worksheets, Word Problems, Math Quiz, Math Puzzles and Free Math Games - MathOcean.com
    This blog is dedicated to provide free worksheets, word problems, simple problems, story problems, math quizzes, math puzzles, math games and much more. ...more>>

  29. Free Puzzles - Jimmie Dean
    A collection of puzzles and brainteasers, divided into geometry, logic, math, weight, moves, and miscellaneous. Each puzzle includes a hint, and solutions are available through e-mail. Online games and puzzles include a chess knight game and Hangman. ...more>>

  30. f(t) - Kate Nowak
    A blog by a self-described "full-time math teacher, curriculum inventor and refiner, adolescent listener, correspondence-to-parents writer, practice problem feedback giver, and example-setter" who has taught high school math since 2005. Posts, which date ...more>>

  31. Fuel the Brain - Dynamics of Design
    Educational games, interactives, printables, teacher guides, articles and tutorials, and seasonal resources. The "inevitable" product of an elementary teacher and her graphic/web designer spouse, Fuel the Brain's most popular Flash games include Jelly ...more>>

  32. funmaths - Fundamental Software
    Download math-related games for Windows (the Rocky's Bouncer algebra game is free; others are shareware.) Teachers can trade worksheets online: everyone may see the measurement worksheets, but the other categories require that you submit your own worksheet ...more>>

  33. Fun, Puzzles, Travel - Paul Bourke
    Brain twisters, arranged by approximate level, and designed for the most part to require no particularly advanced mathematical skills. Illusions include impossible triangle, Muller-Lyer, bad box, and Colours. ...more>>

  34. Futility Closet - Greg Ross
    "An idler's miscellany of compendious amusements." Math posts, which date back to January, 2005, have included puzzles, curios, and trivia from the lives of famous mathematicians -- all "self-contained and written as concisely as possible" -- such as ...more>>

  35. Future School
    Developer of educational software, online tutoring, and home schooling courses. Video tutorials. Sample lessons and ordering information available. ...more>>

  36. fxsolver - Equanalysis UG
    Free equation solver with a formula database for quick calculations on tables and data input "without messing around with programming languages or spreadsheet software." Browse the hundreds of math formulas, then click the gray "Add to Solver" button ...more>>

  37. Gamco Education Materials: Educational Software for K-12
    Programs for Macintosh and Windows, with downloadable demo versions. Math programs include: Skillbuilders (perimeter, area, volume, whole numbers, fractions); Paws and Pyramids (perimeter/area/volume game); Word Problem Square Off Series; Touchdown Math ...more>>

  38. Gamelan - The Official Java Directory - EarthWeb, Inc.
    Gamelan's primary mission is to serve as a central registry and directory of Java resources. Much like Yahoo!, Gamelan collects links to resources stored on other sites across the Web. However, unlike Yahoo!, Gamelan's mission is specific - Gamelan collects ...more>>

  39. Games2Learn
    Vendor of educational games, software, and activities for both parents and teachers. The site may be searched by category (Math, Spatial Learning, Science and Tech, etc.), grade level, game type, or personality profile (Planner, Peacekeeper, Producer, ...more>>

  40. Games Conceived - Leroy Quet
    Quet's blog, begun in September, 2008, describes his "simple games," which include Triangle Grid Of Coprimality; Line-Segments In Circle; Turn It Around -- Multiply/Add Grid; Up And Up, Grid Solitaire; Vertex/Intersection Polygon Game; Diagonal/Straight: ...more>>

  41. The Garden of Archimedes
    Calendar of tours, publications, and more from Florence's museum of mathematics. See, in particular, the exhibitions of Il Giardino di Archimede, such as "Beyond compasses," on the geometry of curves; "Pythagoras and his theorem," a series of puzzles ...more>>

  42. Gateways to Advanced Mathematical Thinking (GAMT) - Michelle Manes; Education Development Center, Inc. (EDC)
    The goal of this project is to research the ways in which high school and college mathematics students come to acquire flexible understandings of essential concepts needed for analytic and algebraic thinking. Integral to this research effort is the development ...more>>

  43. gealgerobophysiculus - Evan Weinberg
    Thoughts on teaching, learning, and "the crazy process of having fun doing both with students." Posts, which date back to September, 2011, have included "How China Keeps Me Learning: Part I," "Lens Ray Tracing in Geogebra," "Take Time to Tech Perspectives ...more>>

  44. GEM: Gateway to Educational Materials - National Library of Education (NLE)
    A database for education links, intended to be more useful for teachers than a search engine. It records the resources of its consortium members (information on joining the consortium is available onsite). Users are able to: browse through lists organized ...more>>

  45. General Mathematics, A-M (Funk & Wagnalls Multimedia Encyclopedia) - Lycos Zone: Mathematics
    Short articles on basic mathematics, including biographical information about mathematicians, from the abacus to Gaspard Monge. ...more>>

  46. General Mathematics, N-Z (Funk & Wagnalls Multimedia Encyclopedia) - Lycos Zone: Mathematics
    Short articles on basic mathematics, including biographical information about mathematicians, from John Napier to Zeno of Elea. ...more>>

  47. GeniusCorner - Dheeraj Khatter
    Adaptive online learning platform for practicing math at your own pace. Freely access multiple choice and fill-in-the-blank math quizzes, organized by grades from pre-K through eighth; GeniusCorner keeps time, scores responses, and offers explanations. ...more>>

  48. Geoboards in the Classroom - Tom Scavo
    A Web unit for teachers from Tom Scavo that offers suggestions for using geoboards to explore the length and area of two-dimensional geometric figures. The Introduction includes pages that describe materials needed, offer discussion and activities for ...more>>

  49. Geocadabra - Ton Lecluse
    Download a demo or purchase this dynamic geometry software, which draws solid geometry, plane geometry, functions and curves, 1-point perspective, 2-point perspective, 3-point perspective, and more. Also available in Dutch. ...more>>

  50. Geo-Calc - BaldGeeks
    Macintosh shareware for calculating the area, perimeter, sides, angles, and other measures of two- and three-dimensional shapes such as ellipses, rectangles, triangles, trapeziums, parallelograms, polygons, prisms, cylinders, cones, pyramids, and spheres. ...more>>

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