 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, 2NWinged Butterfly theorem, several pages on the Two Butterflies theorem. Several of these
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 The Butterfly Website Picture Galleries  Mikula Web Solutions, Inc.
Symmetry in nature: butterfly and moth images from a variety of sources. In most cases, a small picture is included for speed of transmission, and a larger picture is available by clicking on the small picture.
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 Byte Works, Inc.
Developers of the apps iPhone Calculator, a scientific/logic/conversion calculator; and techBASIC, which takes advantage of the iPod's, iPhone's, and iPad's builtin accelerometers, gyroscopes, or magnetometers to collect information, process it with
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 Byzantine Basketball  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A problem (with solution) sent by Prof. W. McWorter's: Byzantine Basketball is like regular basketball except that foul shots are worth a points instead of two points and field shots are worth b points instead of three points. Moreover, in Byzantine Basketball
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 Cable's Leaders in Learning Awards
Cable's Leaders in Learning Awards recognizes outstanding educators, administrators, policymakers, and other community leaders at the forefront of innovation in education. Award categories include: Cable Partnerships for Learning, Pushing the Envelope
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 Cabri Conic Macros  Jim King, University of Washington
Nine Cabri Geometry II macros for constructing conics from various givens and for constructing certain features of given conics. Contains a documentation file.
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 Cabri en Physique  Yves Cortial
Cabri en Physique propose près de 140 figures créées avec le logiciel de géométrie dynamique Cabri Géomètre dont une centaine d'animations en version CabriJava: d'illustrations de phénomènes
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 Cabri Geometry: Classroom Resources  The Math Forum
The Math Forum's page of links at the Forum and on the Web to dynamic interactive geometry classroom resources for Cabri Geometry. Books and Web sites; Frequently Asked Questions; exploring the basics; workshops; excerpts from the journal abraCAdaBRI;
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 Cabrigéomètre  JeanMarie 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 CabriJava), Cabri product information, book and website references, and contact information.
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 CabriJava  JeanMarie Laugier; L'Université de Provence (AixMarseille 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 CabriJava
CabriJava allows you to create dynamic geometric figures using Cabri and publish them as Java applets. In English and French.
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 Cabri Jr.  Texas Instruments Incorporated
Interactive geometry for the calculator: construct, analyze, and transform mathematical models and geometric diagrams. Cabri Jr. imports and exports figures from Windows computers. Take a tutorial, preview and download weekly activities, or browse the
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 Cabriology  Fréderic Louis
In Dutch: a website about the software Cabri Geometry, with tutorials, videos, pictures and more.
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 calc_reform  eMATH/AMS, Math Forum
A discussion around reform of the curriculum and the teaching of calculus and linear algebra, including differential equations, a mix of theoretical issues and concrete practices. Read and search archived messages; and register to post to the discussions.
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 Calc 360  Numerant, LLC
Calc 360 is a free, simple, and powerful calculator for your PC. Some of its main features include: adjustable precision, calculation history window, custom variables, loading and saving of calculations and more...
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 Calc3D  Andreas Greuer
Calc 3D is a free program for calculating 3dimensional vectors, matrices and
complex numbers with Windows 95/98/NT. Cartesian coordinates, spherical coordinates und cylindrical coordinates can be transformed into each other.
Distances, intersections,
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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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 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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 Calculate the Distance Between Two Places  infoplease.com
How far is it from one place in the U.S. to another? As you type, this form automatically completes the names of populated places, schools, "locales," parks, islands, bars, lakes, reservoirs, bays, gaps, dams, glaciers, streams, wells, mines, bends, valleys,
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 CalculateWhat  Colin Fagras
Free online calculators. In addition to covering math topics such as algebra, geometry, and statistics, CalculateWhat crunches numbers on topics financial, scientific, and  under a category called "miscellaneous"  more whimsical and topical in nature.
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 Calculating Car Payments  Barbara Christopher
Lesson plan with the objectives of using a formula containing complex fractions and large exponents to calculate a monthly car payment, using the order of operations while putting such a formula into a scientific calculator, and seeing a very practical
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 Calculating Cones  Monika Schwarze and Bianca Gonterney
A complete lesson plan including all materials, emphasizing a challenging and motivating method for selfguided and cooperative learning.
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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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 Calculation and the Chess Master  Ivars Peterson (MathLand)
In 1912, J. B. Shaw wrote in the Bulletin of the American Mathematical Society: "The game of chess has always fascinated mathematicians, and there is reason to suppose that the possession of great powers of playing that game is in many features very much
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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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 A Calculator
JavaScript calculators: the four basic operations, average, arithmetic congruence, greatest common divisor (GCD), least common multiple (LCM), radical simplifier, word converter that writes out numerals, and more.
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 Calculator Based Algebra (CBA)  Allen V. Robnett
A complete basic algebra course, including a review of arithmetic operations, in 93 TI83 programs. Programs and operating notes can be downloaded here at no charge. The course emphasizes motivation and mastery.
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 Calculator City  1728 Software Systems
Online calculators for solving equations in 2, 3, or 4 unknowns, the Pythagorean theorem, sphere and cylinder area and volume, vector addition, resistors in parallel, chemistry gas laws, compound interest, and loan payments. Games and puzzles include
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 calculator.com  Athera Corporation
Free access to online calculators to help you solve problems and answer questions in the home, office, and school. There are calculators for finance, business, and science, cooking, hobbies, and health. Some solve problems, some satisfy curiosity, and
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 Calculator Directory  ArsRef LLC
Commercial calculating software arranged by category. One page of free online calculators.
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 Calculatorium  Nenad Mitrovic
JavaScript calculators for determining area, perimeter, surface area, volume, trigonometry, algebra, statistics, finance, conversions, health, and more. See also Calculatorium's timed, autoscoring tests and typeset formulas.
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 calculator.org  Flow Simulation Ltd.
A collection of calculatorrelated resources, including an online scientific
calculator, recommendations for hardware calculators, books about calculators, links to other online resources, and a free download of Calc98, a scientific,
engineering,
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 Calculators By Ken  Ken Prentice
Calculators for Windows that convert between different units, create calendars, perform basic physical computations, and more. Read descriptions, or download sample programs.
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 Calculators By Ken  Ken Prentice
Dozens of pointandclick (mouseonly) calculators available for purchase: acceleration, air flow, ANSI codes, area, atomic mass, BTU, calendars, calories, capacitance reactance, circles, circular angles, circular mils, cone, conveyor speeds, current
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 Calculators for Multiplying Vectors  William C. Corwin
Special purpose calculators: determine crown molding, find the bearing for a sundial (sun compass), face towards mecca, predict shadows, solve triangles (given angles or sides or ratios), apply Cramer's Rule, solve three equations with three unknowns
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 Calculators OnLine Center  Martindale's Reference Desk
Online software and Java applets that calculate quantities for a number of general and specific uses. Numerous "calculators" available for Code Translators, Distance/How Far is it?, Finance, Taxes, Grade Point Average, Logic & Syllogism, Navigation/GPS,
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 Calculators OnLine Center: Part II  Mathematics  Martindale's Reference Desk
Over 7,420 calculators for: Unit Conversion (Time, Distance, Length, Speed, Weight, etc.); Abacus; Basic Math; Complex Mathematics; Complex Math Education; Complex Math Calculators by Specialty: Algebra and Linear Algebra; Algorithms; Calculus; Central
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 Calculator Tab: Online Scientific Calculator  Marek Kyncl
A free online scientific calculator, which can store values with custom descriptions between sessions.
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 Calculatorti.com  Mark Shelton
Buy used Texas Instruments calculators; download free calculator programs, emulators, and games for the TI83, TI83 Plus, TI84 Plus and TI89 calculators.
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 CalculusABC.com  Chris Watson
A site for calculus teachers to share questions they've written and discuss
issues relating to the field. Sort multiple choice questions according to calculator use and representation type (verbal, numerical, analytical, or graphical). With web forums
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 Calculus and Differential Equations (MathPages)  Kevin Brown
About 40 "informal notes" by Kevin Brown on calculus and differential equations: limit paradox, proofs that pi and e are irrational, Ptolemy's Orbit, leaning ladders, how Leibniz might have anticipated Euler, and many more.
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 Calculus: an Overview  Paul Pollack
Written by a 16yearold, this siteinprogress contains brief summaries of topics for the advanced high school student. Available pages include: Functions: a review; Limits: what they mean and how to find them; Integration practice problems; Taylor and
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 Calculus Applets  Thomas S. Downey
These pages present interactive Java applets for teaching and learning single variable calculus. They use graphs and tables to illustrate concepts in calculus and allow the user to dynamically change the functions involved or the point on the graph that
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 Calculus Applied to Probability and Statistics  Waner, Costenoble; Hofstra University
A text on the WWW for liberal arts and business majors. Contents (each with exercises): Continuous Random Variables and Histograms; Probability Density Functions: Uniform, Exponential, Normal, and Beta; Mean, Median, Variance and Standard Deviation; You're
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 Calculus Book  Dan Umbarger
Twenty Key Ideas in Beginning Calculus offers a "creative sequencing and presentation of a subset of topics in the standard calculus curriculum." Starring Limitman in LimitmanPiggy challenge games, this calculus book for beginners emphasizes anticipatory
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 Calculus, Concepts, Computers, and Cooperative Learning (C4L)  Ed Dubinsky, David Mathews, and Keith Schwingendorf
"Constructivist learning theory in practice," following six principles: research into student learning is critical; conceptual understanding is primary, but calculations play a major role; the good use of technology can be valuable; cooperative learning
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 The Calculus Consortium  John Wiley & Sons, Inc., Publishers
The Calculus Consortium, based at Harvard University and funded by NSF, produced textbooks such as Functions Modeling Change, Applied Calculus, Calculus: Single Variable, Multivariable Calculus, and the Calculus Live CDROM. These textbooks focus on calculus
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 Calculus graphics  Douglas N. Arnold; Institute for Mathematics and its Applications
Excerpts from a collection of graphical demonstrations developed for a class in first year calculus in the McAllister Technology Classroom. Derivatives and differentials; Computing the volume of water in a tipped glass; Archimedes' calculation of pi;
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 The Calculus Hater's Home Page  Jacob Walker
A forum for people made miserable by calculus. Complaints, links to personal pages, and calculus humor pages. Includes links to helpful calculus resources on the Web.
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