 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 email. Online games and puzzles include a chess knight game and Hangman.
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 Free Ruler  Pascal
Free Ruler is a free screen ruler for Mac OS X with the following features: a horizontal and vertical ruler which can be used independently or simultaneously; measurement in pixels, inches, picas, or centimeters; automatic alignment of rulers; the ability
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 Free Tiiu Pix  Tiiu Roiser
A collection of thousands of free, highresolution images for enhancing lesson plans, as well as research by teachers and students alike. Roiser, a retired teacher, organizes her photos and graphics into categories such as architecture, food, holidays,
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 Frequently Asked Questions About Trigonometry  J. David Eisenberg
An interactive site that explains the ideas behind trigonometry. With Java applets for experimenting with triangles and audio files for hearing the pronunciation of trigonometric terms.
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 The Freudenthal Institute (FI)  Utrecht University, The Netherlands
The National Expertise Center for Mathematics Education in primary and secondary education in the Netherlands. Browse or search research projects including vocational/adult education, math in the city, cultural minorities and math education, innovation
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 Frieze Patterns  David A. Reid
A frieze is a pattern which repeats in one direction. Friezes are often seen as ornaments in architecture. A mathematical analysis reveals that there are seven different frieze patterns possible. These resources were designed for a standardsbased project
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 Frieze Patterns in Cast Iron  University of Cambridge
The 'Sydney Lace' of Australia and the rest of the world, from Paris and New Orleans to Brisbane and Melbourne: examples of all seven frieze pattern types in cast iron decorative work.
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 From Chaos: Beauty  Kitara
Fractal galleries created using UltraFractal.
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 From Constructivism to Active Learning  Siegfried M. Holzer
Summary of an essay defining constructivism and outlining its implications for education: active learning, authentic activities, students' views, authentic assessment, and innovative curriculum. Published in the hypermedia publication of SUCCEED: The
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 From Counting to Writing  Ivars Peterson (MathLand)
Abstract numbers are the product of a long cultural evolution. They also apparently played a crucial role in the development of writing in the Middle East. Indeed, numbers came before letters, contends archaeologist Denise SchmandtBesserat of the University
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 From Galaxies to Electrons (Math Chat)  Frank Morgan, MAA Online
What are the largest and smallest objects anyone has ever seen with the naked eye? heard? felt? (For the first part, the whole object must be seen, though not necessarily in full detail or from every side.)
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 From Lewis Carroll to Archimedes  Cut the Knot!, Alexander Bogomolny
On March 29, 1879, Vanity Fair began offering its subscribers a new weekly puzzle invented by Lewis Carroll... on March 17, 1953 Frank Gray, a research scientist at Bell Labs, filed patent no. 2632058, for the Gray code encoding
the vacuum tube. An ndigit
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 From Now On
A Monthly Electronic Commentary on Educational Technology Issues. Previous issues archived by theme and date; since 1991.
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 From Starting Line to Ancient Angle  Ivars Peterson (MathTrek)
The ruins of ancient Corinth include a stadium that featured several courses for foot races. In 1980, archaeologists found and excavated the curved starting line for one such racecourse, dating from about 500 B.C. Curved to allow a staggered start, the
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 The Fruit Game
An interactive game in which players take turns removing fruit from the table according to the rules. The player who removes the last fruit from the table loses. Based on the mathematical puzzler known as the game of Nim.
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 Fully Interactive Prime Number Simulation
A primality simulation created from three simple rules: each number N creates a circle with a radius of N; the circumference of each circle is divided by N, creating an arc of length of circumference/N; and each arc makes a complete rotation in N iterations.
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 Fun 4 the Brain  Natasha Oliver
Flash games in addition (snowy fun and farm freakout), subtraction (color your vacation and "Can You Dig it?"), multiplication (ping pong the panda and granny prix), and division (Peabody the Penguin, and Sketch), with selfgrading timed quizzes in some
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 Fun and Sun RentACar  Cynthia Lanius
A Java or print lesson plan: investigate using tables, graphs, and linear functions to solve a realworld problem. Includes teacher notes with standards alignment and procedures.
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 FUNBRAIN: Educational, Online Games for Kids  The Learning Network
Interactive, educational math games for kids and children of all ages. Games include Math Baseball and Power Football (test your arithmetic at four possible levels), and Change Maker (run a cash register), as well as Fun Match (a memory game for fractions
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 A Functional Housing Market  Susan Boone
Students use the Internet to search for housing prices in Houston, Texas, (the location can be changed to accommodate any location) and compare the prices to the number of square feet found in the living area of a house. A linear equation is derived from
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 Functional Mathematics  Farman, Danny; and Hoskin, Danny
A scheme of functional units that both challenge and engage the pupils in "FUNctional skills." Freely download PowerPoint presentations and PDFs of projects such as Build a Farm; Cost of Christmas; Mobile Phone Deals; Easter Egg Hunt; Design a Sports
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 Function Machines  Maria Droujkova, Dmitri Droujkov; Natural Math
For children and adults who are starting to develop the concept of function. The authors advise approaching the concept early in life using common sense and intuition, returning to it again and again, each time with a new level of understanding. The units
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 Fundamental Concepts of Fractions  Goalfinder
Commercial interactive fraction animation in Flash format; covers types of fractions, mathematical operations with fractions. Intended to use stories and entertainment to make learning fractions fun.
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 FUNdamentally MATH  Chip Publications
A commercial DOS/Windows program covering kindergarten through grade 12 math topics (Basic skills: Addition, subtraction, multiplication, division, negative numbers; Fractions: ordinary and decimal; Middle school geometry; Exponents: powers, roots, number
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 The Fundamental Theorem of Algebra  MacTutor Math History Archives
Linked essay covering from Cardan in the 1500's to the Euler and Argand proofs through the 1800's, with 8 references (books/articles).
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 Funderstanding Roller Coaster
Java simulation intended for students who want to design a roller coaster and educators who want to use an interactive activity to simulate the application of physics. Includes information on the following topics: acceleration; centripetal force; energy;
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 Funding Educational Technology: Online Resources (NJ NIE)  New Jersey Networking Infrastructure in Education
The sites listed may not have information directly relating to obtaining funding, but all of the organizations do provide it. Links to sites in the following categories: government, foundation, business, and other, and a section of grants for school telecommunications
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 Funforms: a New Math Learning System  Joel S. Steinberg
An abacus or sliderulelike notation system, essentially binary (though a trinary system also exists). The web site includes a description of how to use it, and suggests that it might be taught to preschoolers as a game, or used to teach math concepts
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 The FUNKtion  Appreciating Math through Art  ThinkQuest 1996
How to do really hard graphic stuff. Tilings, Fractals, Sierpinski Gaskets, animations, pictures, links. Math "crash courses" on Complex Numbers; Magnitude and the Pythagorean Theorum; Functions; and 3D.
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 funmaths  Fundamental Software
Download mathrelated 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
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 Funny Arithmetic  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A Java game: using arithmetic, logical, and bitwise shift operators and parenthesis, build an arithmetic expression with as many Base digits as specified in the Number of occurrences. Your expression should evaluate to the specified Goal. For example,
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 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, MullerLyer, bad box, and Colours.
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 Fun with Cellular Automata  Mathilde Rufenacht
Java applets such as "pattern calculators" for exploring onedimensional cellular automata, Conway's game of life, and the skins and furs of animals. Also, use the site to run your own screen savers.
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 Fun with Fractals and the Platonic Solids  Gayla Chandler
A site rich with photographs and drawings of Sierpinski triangles and Platonic solids, made by hand, to inspire children of all ages to construct their own mathematical structures. See photographs, many set in marine environments, of dodecahedra, hexahedra
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 Fun with Fractals  Keith Gabryelski
Click in the fractal image to select the area of the fractal you would like to examine; select a location and style for the fractal image by modifing the values in the form.
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 Fun with maths!  Stuff Media, U.K.
Puzzles for which you need shockwave installed on your computer. (You can download it from this site.) Number Square (add numbers and see them grow, smash them with a fist, make patterns); Think of a number between one and nine, multiply it by 5... will
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 Fun with Probability! The Probable Pen in the Cereal Box  Michael Cornell; College of Education, Univ. of Illinois at UrbanaChampaign
A cooperative classroom project for grades K9. Over a threeweek period (24 April  10 May 1996), project participants jointly calculated the expected value of a simple probability problem via experimentation. This joint effort among interested schools
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 The Fun Works  Education Development Center, Inc. (EDC)
A career exploration digital library for middle school youth (ages 1114 yrs), designed to capture imaginations and direct youth toward careers in science, technology, engineering and mathematics (STEM). It places particular emphasis on engaging youth
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 Further Mathematics Support  Mathematics in Education and Industry
The Further Mathematics Support Programme (FMSP) promotes advanced math across the United Kingdom (UK) through professional development for teachers and tuition to students in Britain. Further Maths is an AS/A level qualification which both broadens and
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 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 "selfcontained and written as concisely as possible"  such as
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 Future of Math  Jamie Tubbs
This site supports the use of blogs, digital cameras, digital portfolios, discussion forums, spreadsheets, and other digital media to enhance student understanding of mathematics. Find suggestions on how to teach with journals, problemsolving, learning
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 Future School
Developer of educational software, online tutoring, and home schooling courses. Video tutorials. Sample lessons and ordering information available.
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 Gadgets  Jan Gombert
Gombert's five "gadgets" provide simple challenges that combine addition, multiplication, and two or threedimensional geometry. Balancing Act shows three values on a beam to balance by addition. Make a given perimeter or area by resizing the figure
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 GalaxyGoo
An interdisciplinary, volunteer thinktank dedicated to exploring expressions of science and math with online technologies, for public benefit. Read interviews of scientists; explore math such as the sine curve with Flash, participate in forums and blogs,
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 The Galileoscope™  International Year of Astronomy
Highquality, lowcost, easytoassemble telescope kits developed for the International Year of Astronomy (2009) in celebration of "... the celestial wonders that Galileo Galilei first glimpsed 400 years ago and that still delight stargazers today. These
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 Gallery of Fluid Mechanics  M. S. Cramer
An image/movie gallery illustrating a wide variety of phenomena, including aurora, vortices, supersonic flow, supersonic cars, water drops, water waves, and shock waves. Accompanying each image or movie is a brief physical explanation. Students and teachers
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 Gallery of Fractal Images  Paul Bourke
An experiment in a creating a virtual gallery based upon a minimal WWW environment that doesn't require Java, VRML, or server features such as a rendering engine or CGI programs. Upon entering the gallery, move forward by clicking near the upper center
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 The Galois Story  Ivars Peterson (MathTrek)
The life and death, myth and reality, of Evariste Galois, with a short bibliography.
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 Gamco Education Materials: Educational Software for K12
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
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 Game Cafe (GirlTech)  Radica Games, Ltd.
Games for kids to print out and play offline. Amazing Math Path explores the world through numbers: Letter Logic (find a path to link the letters); Sum it Up (how much does your name cost?); A Colorful Survey (compare your color preferences to those of
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