 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 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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 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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 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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 Calendrical Calculations  Nachum Dershowitz and Edward M. Reingold
A book about the algorithms used to calculate different calendars (Gregorian, Julian, Mayan, Hebrew, Persian, and more.) The preface, table of contents, index, and a sample chapter are available in PDF and PostScript formats. Other book resources include
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 The California Learning Resource Network  California Department of Education
An educator's guide to instructional technology resources that support California's curriculum frameworks and standards: if an instructional program marketed to schools uses a computer, a VCR or laserdisc player, a network or the Internet or any combination
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 Carolina Science and Math Catalogs  Carolina Biological Supply Company
Teachers may request a free catalog with supplies for the math and science classroom. "Carolina Mathematics" includes math teaching supplies, books and workbooks, calculators, posters, tools, and gifts. Features some multicultural materials.
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 Casio Classpad 300 Resource Center  Saltire Software
The Casio Classpad 300 is an intuitive pen based calculator with draganddrop mathematics and geometry. ClassPad.org is packed with resources to help both teachers and students access the full power of the ClassPad. It includes many explorations and
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 Casio Kingdom  Sean Tan
CFX9850 games and programs. A game and several programs, including: Sphere (solves where a point is in relation to a sphere, whether it lies outside, inside or on the sphere); Divide (finds the position vector that divides vector AB in the ratio a:b);
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 Casio Solutions  Charlie Watson
For CASIO graphing calculator users: high school level Casio calculator resources, including downloadable programs, student worksheets and activities, calculator comparisions, links to other Casio sites, a listing of print resources for educators, with
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 CAS Musings  Chris Harrow
Blog by a math teacher at a prep school in Ohio. Posts, which date back to March, 2011 and emphasize science, technology, engineering, and mathematics (STEM) and computer algebra systems (CAS), have included "Transforming inverse trig graphs"; "Birthday
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 Center for Technology and Teacher Education  Curry School of Education, University of Virginia
An interdisciplinary group that develops materials to prepare teachers to use technology to enhance and extend students' learning of mathematics. This site offers activities using graphing calculators, The Geometer's Sketchpad, Microsoft Excel, the ExploreMath.com
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 Cereal Box  Beverly Farahani
This activity allows students to develop and carry out a simulation, and analyze results in terms of mean and median. It uses an openended problem, and could involve use of a graphing calculator or Fathom II software (optional).
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 Chemistry Spreadsheet Calculator  James T. Parker
A calculator designed to help teach high school students how to balance chemistry equations and then perform basic stoichiometry calculations. Includes a short tutorial.
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 Chinese Numbers  Erik E. Peterson
Convert arabic numerals up to 1 billion into Chinese numbers, or show the value of a Chinese number (type or paste in a number in Chinese and click "Show English." With, in addition, A Brief Description of the Chinese Number System, and links to related
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 Chronological Age Calculator  AGS Publishing
Click the "Age Calculator" button, then enter two calendar dates to compute elapsed years, months, and days. Available for download.
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 CLKCalculator  Lars Kobarg
Reverse Polish notation Calcualtor is a calculator program for Windows with unit conversion and matrix calculator, functions for vectors and complex numbers, and a
function plotter.
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 CLKCalculator  Lars Kobarg
A skinnable calculator for Windows, intended for a wide range of users. Use algebraic or RPN input mode to do unit conversions, matrix calculations, complex number calculations, vectors handling and function plotting. Find constants or formulas in the
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 A Collection of JavaScript Elabs Learning Objects  Hossein Arsham
A basic calculator for numerical experimentation, as a learning tool for the fundamental mathematical concepts and functions (as students do in, e.g. Physics labs.) Includes powers, exponents, square roots, factorials, trig functions. Link to further
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 Color Mathematics  Erwin Gelber
High school math software for algebra, geometry, and vectors  includes a graphic calculator, an equation solver, and more. Uses a color system for improved memory.
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 Compressible Aerodynamics Calculator  William J. Devenport
Computes the standard relations for compressible flow of a perfect gas.
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 Comptometer  Biography of a Machine  Brooke W. Boering
A site on the early development of the business calculator around the turn of the twentieth century in America. Learn about the various models of comptometers, their features, and how to identify them; Dorr Eugene Felt, their inventor, and the company
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 Computers and Internet : Hardware : Calculators : Hewlett Packard  Yahoo
Yahoo's Web page of sites having to do with HP Calculators.
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 Computing Before Computers  Brian Borchers, New Mexico Institute of Mining and Technology
Online introductions, with PostScript or PDF downloads, of Napier's Bones and of the GenailleLucas Rulers. Pictures of statistical computing devices such as the Pickett N525ES Statrule, the cumulative binomial probability computer, the General Dynamics
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 Continued Fractions With A Calculator (SMILE)  Fred J. Schaal, Lane Tech High School
A lesson designed to teach students how to evaluate continued fractions by taking many reciprocals with a calculator. From the Arithmetic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning
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 Conversion Page  Keith Hooker
Convert to and from U.S. fluid/dry and metric measures: quarts, cups, teaspoons, gallons, fluid ounces, tablespoons, liters, milliliters; pounds, ounces, grams, kilograms.
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 Conversion Program  Lawrence Goetz
A page that uses JavaScript to convert temperature between Fahrenheit and Celsius, length among inches, centimeters, feet, yards, meters, miles, and kilometers; weight among grams, ounces, pounds, and kilograms; and volume among fluid ounces, cups, pints,
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 The Converter Site  Alastair Hazell
A user friendly metric and imperial converter tool. Converts length, area,
weight, speed, temperature, time, energy, force, length, mass, power and
currency.
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 Convert It!  Micro Images Internet Services
Conversion tables: enter a number and convert from one unit to another: acceleration, area, energy/work, power, length, mass, metrology, pressure, temperature, volume, U.S. fluid/liquid, and velocity conversions are all possible.
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 CostOfLiving Calculator, Percent Change Calculator  NewsEngin Inc.
The cost of living utility converts dollar values, adjusting for inflation. Find the buying power of dollar amounts dating back to 1957, according to a national U.S. city average, urban regions, or metropolitan areas, as based on the historical Consumer
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 Countdown!  Objective Consulting Inc. (OCI)
Calculate the number of seconds between any two events: find out how long it will be until the millennium, until your birthday, or simply how long you have been alive. Answers are also expressed in days, hours, and minutes.
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 Curriculum IT Support (CITS)  Department for Education and Employment, UK
Materials, publications, and activities encouraging the use of information technology in secondary schools (1118 years). Information includes: a database about the use of IT in mathematics lessons in secondary schools; a booklet describing how some departments
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 Curves and Lying Calculators  Ivars Peterson (MathLand)
The pictures generated by a graphing calculator depend on the number of pixels in the display. The TI85 has 63 rows and 127 columns in its display (a total of 8,001 pixels). "This configuration of pixels defines what we actually see and, therefore, sometimes
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 Daily Desmos  Anderson, Dan; Fenton, Michael; and Lanier, Justin
A daily challenge to reproduce a given graph using Desmos or some other graphing calculator. Teachers Anderson (NY), Fenton (CA), and Lanier (NY) rate the plots by difficulty. Also available from http://dailydesmos.blogspot.co.uk/.
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 DanielSoper.com  Soper
Statistics calculators from the California State University (Fullerton) professor of information systems and decision sciences: analysis of variance (ANOVA), beta distribution, beta function, binomial distribution, chisquare distribution, confidence
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 Datamath Calculator Museum  Joerg Woerner
Historical calculators and educational toys, primarily from Texas Instruments. History of calculators, technical details, many interesting sidelights, including downloadable emulators.
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 Datexx On Line
Personal electronics to purchase: basic calculators, clocks, computer accessories, desktop calculators, organizers, printing calculators, scientific calculators, toys and games.
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 David Goodman's Math Links  David Goodman, editor
Link listings for a variety of topics, organized by those topics.
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 David Royster's Home Page  Dept. of Mathematics, Univ. of North CarolinaCharlotte
Research and Scholarly Interests  Papers: Algebraic and Differential Topology; Use of Computer Algebra Systems in Mathematics Education. See also MAED 3103, a course for Secondary School mathematics teachers covering material drawn from Algebra I and
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 DavidsoftNet  David Strauss
A site that organizes and presents Texas Instruments (TI) calculator software and other resources on the Web in folders and categories, much like Yahoo. TI Calculator links are broken down into assembly coding sites, hardware sites, major sites, TI85
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 Deckulator  Michael B. Moore
For your collectible trading card games, especially Magic: the Gathering. Deckulator calculates the percentage that a card combination will occur in the first cards dealt off the top of the deck. The calculator uses multivariate hypergeometric distribution.
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 Demos with Positive Impact  David R. Hill and Lila F. Roberts
Demos with Positive Impact organizes effective math teaching tools. Submit your own demo, or browse the existing collection of physical demos, calculator demos, databased demos, browserbased demos, and software demos, each with statements of objectives,
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 Department of Mathematical Sciences  U.S. Military Academy, West Point
Publications include Cryptologia, CASE (Computer Algebra Systems in Education), Mathematica Militaris, and PRIMUS (Problems, Resource, and Issues in Undergraduate Mathematics Studies). MathTECH is a research project that provides Java applets and TI89
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 Derivative Calculator  David Scherfgen
Compute derivatives of functions online, for free. Supporting symbolic computation of the 1st, 2nd, and subsequent derivatives of multivariable functions, the Derivative Calculator dynamically typesets expressions while you type them. derivativecalculator.net
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 Digital Generation Unit Conversions  Digital Generation
Choose from 26 different categories of engineering and scientific units. Also available at http://www.webcom.com/legacysy/convert2/convert2.html and http://www.legacysy.com/~legacysy/convert2/convert2.html.
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 DIGSTATS  Statistics  Central VA Governor's School for Science and Technology
Pages for descriptive statistics, inferential statistics, and graphical analysis, from the 1997 Central VA Governor's School for Science & Technology. Activities for spreadsheets and the graphing calculator that explore measures of central tendancy
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 Discover TI Neighborhood Workshops  Texas Instruments, Inc.
The free Discover TI Neighborhood Workshop provides a handson beginner's introduction to TI graphing technology. There will be 25 workshops throughout the United States. There is a choice of six different topics that appeal to middle school and high
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