- Barcode Encoding - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Barcodes are used with various encodings all over the world to simplify product identification, especially in retail. The site explains the most popular encodings, like UPC (Universal Product Code), ISBN (Intenational Standard Book Number), and EAN-13
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- Barry G. Adams
Barry Adams is a professor of mathematics and computer science at Laurentian University in Ontario, Canada. His website includes many Java applets, including elementary numerical methods (i.e. Newton's Method), various examples of chaotic attractors,
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- Base Conversion Routine - David Cronin
This is a Javascript base conversion program for bases 2 through 36. The author writes: "Feel free to make use of it. It's limited only by the precision of enviroment runtime."
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- Base Converter -
Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A fairly high-level introduction to binary and other base systems, with a Java converter and links to related pages including: arithmetic operations in various bases, algorithmic conversion procedure, linguistic fun with base 36, Napier bones, abacus,
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- Base Ten Block Activities - Margo Lynn Mankus
Manipulate a Base 10 Block Applet developed by Jacobo Bulaevsky to explore whole decimal numbers with blocks. There are printable examples of pattern blocks, graph paper, rods, and color tiles, and activities designed to make connections between the use
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- Basics of Business Math - Sebastien Letellier; Seletel Informatique
This online course is designed for users who want to improve their basic math skills. It covers basic mathematical calculations commonly used in business settings, including computing fractions and decimals, the order of operations for combined computations,
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- Basics of Computational Number Theory - Robert Campbell
An introduction to computational number theory, beginning with a quick overview of arithmetic in the modular integers. Throughout, the paper emphasizes computation and practical results rather than delving into the why. Simple programs, generally in JavaScript,
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- BasketMath Interactive - Robert Cummings, Science Academy Software
Science Academy Software's BasketMath online interactive application drill and practice site offers auto-scoring questions in arithmetic, rounding and writing numbers, order of operations, factoring, adding or multiplying signed numbers, calculating perimeter
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- Berrie's Statistics Page - Berrie Zielman
Statistical concepts illustrated using small QuickTime movies. Topics include: Interactive graph of the central limit theorem; normal approximation of the binomial distribution; Poisson distribution; Mean and Variance in the Normal Distribution; Graph
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- Between Arithmetic and Algebra - Cut the Knot!, Alexander Bogomolny
What is the difference between the arithmetic 3+5 = 5+3 and the algebraic a+b = b+c? One is a specific fact, another is a pattern valid in a multitude of situations. While arithmetic may hint at some regularities, algebra, as a language, gives expression
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- Big Integers in JavaScript - Leemon Baird
A JavaScript library for arbitrary-precision integers. This page performs RSA in any base: binary, decimal, hexadecimal, base 64, and base 95 (whole keyboard), in which the message can be ordinary text. The library allows addition, subtraction, multiplication,
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- The Birthday Problem (MSTE) - George Reese; University of Illinois at Urbana-Champaign (UIUC)
This activity discusses the probability that there will be at least two matching birthdays in a small group of people. It includes an online program that creates a set of dates at random. Introduction, simulation, questions, an explanation, and a note
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- Bisection Method Tutorial - Joseph L. Zachary
A tutorial that explores the bisection method for finding the roots of equations. Includes a Java applet that opens in a separate window, for use alongside the tutorial. From a Computer Science course at the University of Utah, and the book Introduction
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- BIT-101 Lab - Keith Peters
Launch BIT-101 Lab to browse Peters' repository of experimental Flash files, many interactive, dating back to 2001. He also provides tutorials on using Flash to simulate gravity, easing, elasticity, perspective, 3D rotation, and "the various little creatures
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- BitArt - Robert J. Krawczyk
Illustrated introductions to spirolaterals and strange attractors. See a self-running demonstration of a variety of spirolaterals, or generate one of your own and see all the reversals. The link of current exhibits lists installations showing strange
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- Black Saturn Mandelbrot Set Explorer - Kokoska
Very high, high, and low resolution Java applets for zooming in on smaller and smaller areas and discovering the hidden complexities of the Mandelbrot set.
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- Blended Learning and Teaching with Animation - Dr S. M. Hajsadr
Algebra lessons online. Free registration required. From the site: Electronic lessons are animated learning material which deliver classroom or tutor like teachings. They are developed following the strict guidelines drawn from many years of research.
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- Blogic - J. David Velleman, Dept. of Philosophy, Univ. of Michigan
An interactive textbook in logic. Topics and interactive software include: Boolean searching; logic circuits; truth-tables; Turing machines; foundations of probability; modal logic with possible-worlds diagrams; quantification. Includes interactive
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- Bob's Pages - Bob Allanson
A collection of geometry applets. Generate and modify polyhedra, investigate the Mandelbrot and Julia sets, or experiment with Pappus's arbelos, the porisms of Poncelet and Steiner, and a logarithmic spiral.
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- Body Surface Area Calculator - Evelio Perez-Albuerne
Calculate the surface area of your body (in square meters) from height and mass.
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- Bottles in a Wine Rack - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Arranging wine bottles in a rack leads, under certain circumstances, to a curious mathematical problem discussed in books by S. Wagon and R. Honsberger. The site arouse out of an attempt to illustrate their solution. The dynamic illustration quickly
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- Brachistochrone Construction - Alexey G. Ivanov
A Java applet graph of the brachistochrone for the given endpoint, a good introduction to the calculus of variations, important in classical mechanics. See also an earlier version of the applet, and a Russian version of the page.
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- BrainBashers - Kevin N. Stone
A collection of logic, language and math puzzles, in a choice of easy/medium/hard. Rate the puzzles; show their answers. Logic puzzles include Einstein's Puzzle. Play games of strategy, such as "Four in a Row" (also known as "Connect Four") or games based
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- Brain Food - Puzzles For the Brain To Gnaw On - Samuel Stoddard
Hundreds of online (CGI) puzzles, including logic puzzles, word problems, number puzzles, lateral thinking puzzles, scrambled equations, cryptograms, logi-number puzzles, discrete reasoning puzzles, mathematical reasoning puzzles, knight's dilemma, magic
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- Brainormous
Educational games and worksheet makers. Some games are free to play online. The rest are available for demo or purchase.
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- BrainPOP Math - BrainPOP, LLC
Short animated films that are simple and easy to understand on elementary mathematics, as well as health, science, and technology. Films often accompanied by quizzes.
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- Brainwave - Wognum Art
Ten visual puzzles, to test your visual and reasoning skills. Most have to do with symmetry recognition. There is a "top 5% brain" award to those who earn ten "smart bulbs."
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- Breaking Chocolate Bars - Cut the Knot!, Alexander Bogomolny
The chocolate bar puzzle has three parameters: two side lengths (m and n) and actual selection of lines along which to break the bar and its parts... An interactive column for MAA Online that uses a Java applet to simulate a puzzle or mathematical problem,
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- Brighten's Fractals Page - Brighten Godfrey
Investigate "Just Another Fractal Generator," a Java applet to make Iterated Function System (IFS) fractals based on triangles, or view a gallery of images created using the program.
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- A Broken Calculator - Cut the Knot!, Alexander Bogomolny, with Don Greenwell
Thoughts on the controversial question of using calculators in the classroom, and the author's belief that even a broken calculator may have its uses: the elementary mathematics curriculum may emphasize any or all of the paper-and-pencil, mental, or technology-based
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- Brownian Motion - Charlie Geyer
An applet that draws one-dimensional Brownian motion, with source code and a link to statistical Java applets by others.
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- BTU Calculator - HearthNet
A calculator that estimates the heating needs of a room, a combination of rooms, or an entire home. Enter the length and width of the area to be heated and select the climate and insulation factors from the pop-up boxes. A Java version of this calculator
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- Bubble Trouble Balls Puzzle - Maxim V. Kollegov
You see two views of a cube made out of 3x3x3 shuffled bubbles. One of the cells in this cube is empty. You can shift a neighboring bubble to the empty place by clicking on it. Rearrange the bubbles in the two bottom game views as shown in the example
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- Buffon's Needle - Michael J. Hurben
A Java applet that simulates a Monte Carlo method for the estimation of the value of pi, 3.14159265... The user controls the speed of simulating the dropping of up to 100,000 needles or pins on equally spaced parallel lines, while a bar graph displays
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- Building Big - WGBH Educational Foundation
Explore great feats of engineering and the ingenuity of the engineers, architects, and builders who designed and built them. Learn about bridges, domes, skyscrapers, dams, and tunnels; use Flash interactive engineering labs to experiment with forces,
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- The Burr Puzzles Site - IBM
A Burr Puzzle consists of at least three rods intersecting each other at right angles. The most well-known type is the six piece burr where three sets of two rods intersect each other. This site lets you explore six piece burrs by selecting from a list
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- Butterfly Station - Manfred Ullman
Applets for exploring spirographs, pendula, the Mandelbrot set, and Lorenz attractors.
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- The Butterfly Theorem - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Ten proofs (and a few variations) of the beautiful Butterfly theorem, with illustrations and remarks. Links to some generalizations: A Better Butterfly theorem, 2N-Winged Butterfly theorem, several pages on the Two Butterflies theorem. Several of these
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- By the Numbers - Kinder Magic Software
Practice basic consumer math skills with Java applets that pace you though arithmetic problems, step by step: addition or subtraction of whole numbers or of decimals, percent mark-up, multiplication by one- and two-digit numbers, multiplying decimals,
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- Cabri for the Classroom - Katarzyna Winkowska-Nowak, Florida Atlantic University
Classroom applications of the Cabri dynamic geometry software package: Java applets, figures, and Microsoft Word documentation, organized into science and art applications, tessellations, fractals, examples of famous curves, and advanced topics such as
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- Cabri-géomètre - Jean-Marie Laborde
The French site for Cabri Geometry, the geometry software program. The site includes a brief history of the program, a list of new things on the site (see also Cabri-Java), Cabri product information, book and website references, and contact information.
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- Cabri Java Applets - Jen-chung Chuan
Well over one hundred applets based on Cabri drawings.
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- CabriJava - Jean-Marie Laugier; L'Université de Provence (Aix-Marseille I)
Optique, électicité, mécanique. CabriHop: Une série de constructions d'optique géométrique et physique, niveau lycée et un peu +, à visiter en premier pour les paramétrages de votre navigateur,
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- Cabri Java Project/Projet Cabri-Java
Cabri-Java allows you to create dynamic geometric figures using Cabri and publish them as Java applets. In English and French.
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- Calchemy Live! - Calchemy Software Inc.
Express the parameters of an equation in any convenient units of measure. Calchemy then checks the equation and parameters for dimensional consistency and makes all the necessary units conversions automatically. Categories include acceleration, angle,
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- Calc.Matthen.com - Matt Henderson
A webpage which allows users to manipulate their formula or plot it.
Supports differentiation and integration among other things.
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- Calcugator - Moscazul Software Llc
Licensed software that "... works like a calculator, a plotting engine, and a programming environment." Calcugator creates bar, pie, pareto and xy charts; 2D plots of functions as well as polar and parametric displays; and 3D plots of functions, contour
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- Calculating the Volume of a Vase
- Web Feats Workshop II
Determine the volume of the vase pictured. The photograph shows the construction of the vase and that its height is 50 cm. Use the applet to find the coordinate values for the edge of the vase, and use the regression features of a graphing calculator
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- Calculations and Formulas for Gemstones - Dendritics Incorporated
Calculate the carat weight or specific gravity of a gemstone or the value of precious metals in various currencies, or convert weights among grams, carats, pennyweights, and ounces.
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- Calculations A: On-line Activity - Basic Arithmetic - Gilbert Chandler; University of Melbourne, Australia
Questions that can be used to practice simple arithmetic skills (addition, subtraction, multiplication, division) and check your answers online. The levels of difficulty can be varied for each question.
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The Math Forum is a research and educational enterprise of the Goodwin College of Professional Studies.