 Central Bureau of Statistics  The State of Israel
The Israeli agency in charge of collecting official statistics. Site includes a description of the bureau, its legal basis, and graphs and tables of key economic figures. Tables and timeseries of socioeconomic, climate, and environmental data are also
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 Central European Journal of Mathematics (CEJM)  Central European Science Journals
A new journal devoted to scientific publications in all areas of pure mathematics. Papers in applied mathematics, which have special importance for theoretical studies, are also accepted. The journal welcomes research articles, containing new results
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 The Central Limit Theorem and the Quincunx  Stevenson, Coates
An introduction to the normal or Gaussian curve, including Quincunx and dicethrowing applets. The Quincunx is a device which allows a bead to drop through an array of pins stuck in a board. The pins are equally spaced in a number of rows and when the
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 Central Limit Theorem Applet  R. Todd Ogden; Dept. of Statistics, Univ. of South Carolina
An applet that demonstrates the central limit theorem using simulated dicerolling experiments. An "experiment" consists of rolling a certain number of dice (15 dice are available in this applet) and adding the number of spots showing. This experiment
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 Central Office of Statistics, Malta
The COS collects statistics for the Maltese government. List of publications, tables of key data, and press releases.
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 Central Service for Statistics and Economic Studies (STATEC)  Luxembourg
The agency for official statistics for the country of Luxembourg. Description of the agency and tables, graphs, and brief articles about key social and economic data available in English and German. More information may be found in the French version
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 Central Statistical Bureau of Latvia  Republic of Latvia
The statistics collection department of the government of Latvia. Key socioeconomic figures, press releases, list of publications, legal basis and history of the bureau. A version of the site is also available in Latvian.
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 Centre de Recerca Matemàtica (CRM) (Univ. of Barcelona)  Manuel Castellet, Director
In 1984, the Institut d'Estudis Catalans created the Centre de Recerca Matemàtica (CRM), with the main goal to provide Catalan mathematicians with a research institute which would stimulate the improvement of mathematical research in Catalonia,
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 Centre de Recherche en Théorie des Catégories  Montreal  Department of Mathematics and Statistics, McGill University
Category Theory Research Center.
List of current seminars; past seminars, conferences, and meetings; links to papers and home pages for members (and some past visitors) of the Centre; links to related sites.
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 Centre for Analytical Finance (CAF)  University of Aarhus and Aarhus Business School, Denmark
CAF is based on a grant from the Danish Social Science Foundation. Its main purpose is to strengthen research in theoretical and applied finance in Denmark. It has members from the Department of Management and Department of Economics , University of
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 Centre for Chaos And Turbulence Studies (CATS)  Hansen, Cvitanovic'; University of Copenhagen, Denmark
Conferences, preprints, and courses; people at the Centre; information about CATS and Neils Bohr Institute (NBI) computers; relevant links, an annual report, and forthcoming CATS seminars.
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 Centre for Discrete and Applicable Mathematics (CDAM)  London School of Economics and Political Science (LSE)
The Centre aims to bring together strands of mathematical work being carried out at the LSE and to raise the profile of mathematics in the social sciences, bringing together members from the departments of Economics, Mathematics, Operational Research,
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 Centre for Discrete Mathematics and Computing  Mathematics, Computer Science, Electrical Engineering; Univ. of Queensland, AU
A centre whose aim is to carry out and promote research and teaching in discrete mathematics and computing, and to facilitate collaborative research with groups working in related areas in Australia and overseas. The Centre publishes the Australasian
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 Centre for Discrete Mathematics and Theoretical Computer Science (CDMTCS)  Computer Science, Mathematics; Univ. of Auckland, NZ
A centre founded to support basic research on the interface between mathematics and computing, to foster research and development in these areas within the South Pacific region, and to create links between researchers in that region and their counterparts
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 Centre for Education in Mathematics and Computing (CEMC)  Faculty of Mathematics, University of Waterloo, Canada
Home of the Canadian Mathematics Competitions (CMC); the Canadian Computing Competition; and contests for middle and high school students. Download PDFs of contest problems dating back to 1997. Register, obtain results from the competitions, participate
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 Centre for Experimental and Constructive Mathematics (CECM)  Dept. of Math. and Statistics, Simon Fraser University, B.C.
Located within the Dept. of Math. and Statistics at Simon Fraser University's Burnaby Campus in British Columbia (Canada), the Centre explores and promotes the interplay of conventional mathematics and modern computation to provide a computational environment
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 Centre for Innovation in Mathematics Teaching  University of Plymouth
A focus for research and curriculum development in mathematics teaching and learning with the unifying aim of enhancing mathematical progress in schools and colleges. The site includes: The Mathematics Enhancement Programme; Resources: worksheets in HTML
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 Centre for Logic and Philosophy of Science  University of Ghent, Belgium
Members, events, preprints and books, research interests.
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 Centre for the Popularisation of Mathematics  Ronnie Brown, School of Mathematics, University of Wales, Bangor
The Centre's goal is to present Mathematics to as wide as possible an audience, and to give an impression for mathematics of its objects of study, methodology, successes and applications, enjoyment, and the wider context. Includes the WWW version of the
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 Centre for the Study of Mathematics Education (CSME)  P. Gates; University of Nottingham, U.K.
The CSME incorporates the Mathematics Education Social Research Group and the Shell Centre for Mathematical Education, which closed on 31 December 1997. See, in particular, the Mathematics Education Booklist.
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 Centres and Institutes  Canadian Mathematical Society (CAMEL)
An alphabetical list of Canadian institutes and research centres. Also links to comprehensive lists of math centres and math societies, institutes, groups, and
associations around the world.
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 CEO Forum on Education & Technology
By regularly highlighting the importance of education technology and monitoring its deployment in the schools, CEOs seek to accelerate the country's progress in preparing our children for the next century. The site contains a description and overview
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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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 The Cereal Box Problem: A Lesson in Expected Value (MSTE)  George Reese; University of Illinois at UrbanaChampaign (UIUC)
Collect all six! How many cereal boxes would you expect to have to buy to get all the prizes? This lesson examines this expected value question and includes an online simulation.
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 CERFACS  European Centre for Research and Advanced Training in Scientific Computation
CERFACS is one of the world's leading research institutes working on efficient algorithms for solving largescale scientific problems. This involves the evaluation of existing, and the development of new tools which exploit highperformance serial, vector,
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 CESAME Support Site for Investigations Discussions  CESAME, Brown University, Math Forum
A place to share ideas, questions, and experiences from teaching TERC's Investigations in Number, Data and Space at four levels: Grades K1; 23; 45; and Special Needs Students. Discussion archives are searchable and browseable, and you may also join
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 CFD Online (Computational Fluid Dynamics)
CFD Resources Online (a comprehensive collection of annotated links to information related to CFD, in particular software and publications); CFD Jobs Database (a forum where companies and universities can advertise open positions in CFD); CFD Online Discussion
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 CGAL  Computational Geometry Algorithms Library
The CGAL project is a collaborative effort to develop a robust, easy to use, and efficient C++ software library of geometric data structures and algorithms. Manual, supported platforms, download, patches, user support; also publications, extension packages,
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 Chain Rule Calculus Song  North Carolina School of Science and Mathematics (NCSSM)
Real Audio file of an original song, accompanied by piano, that teaches the chain rule, with example derivatives. Also listen to a tune about the product rule.
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 Chain Rule  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about the chain rule, such as when to use it and why.
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 Challenge by Choice  David Suarez and others
A classroom mathematics program that lets students choose their own level of challenge within the structure of the curriculum. His blog offers details of the program, the theoretical and practical basis of differentiated instruction, and the results he's
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 The Challenge of Detracking: Finding the Balance between Excellence and Equity  Lockwood, Cleveland; UEWeb
Download this PDF for an introduction to and background of tracking; terminology, issues, and data showing prevalence and impact; and bibliography.
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 Challenger Center for Space Science Education
A notforprofit organization committed to promoting science literacy. Partnering with museums, science centers, schools, universities, and communities across North America, Challenger Center uses the theme of space exploration to create positive learning
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 Challenges: Mathematics and Statistics  InnoCentive, Inc.
"Seekers" submit challenges to InnoCentive's online marketplace for innovation, where scientists, engineers, professionals and entrepreneurs collaborate to solve them. The most innovative solutions receive financial awards ranging up to US$1,000,000.
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 Challenges  RSA Security
Read about three cryptographic challenges: RSA Factoring Challenge, SecretKey Challenge, and DES Challenge III. For the solution of these cryptographic challenges, RSA offers cash prizes as "... modest rewards for some of the hard work that goes into
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 Chalmers Finite Element Center  Chalmers University of Technology, Göteborg, Sweden
An interdisciplinary unit at Chalmers University of Technology in the field of computational mathematical modeling and scientificindustrial computing. It is formed by groups in the Departments of Electromagnetics, Mathematics, Solid Mechanics, and Structural
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 Chameleon Graphing: Lines and Slope  Ursula Whitcher
A Web unit for middle school and early high school students, in which Joan the Chameleon introduces and explores lines and slope, to accompany a unit for elementary and middle school students on The Coordinate Plane. See also Whitcher's unit on Plane
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 Chameleon Graphing: Plane History  Ursula Whitcher
A Web unit for middle and high school students. Sam the Chameleon investigates the history of the coordinate plane. Was it invented? Who named it? The unit includes a glossary and brief biographical information about the historical figures involved. See
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 Chameleon Graphing: The Coordinate Plane  Ursula Whitcher
A Web unit that introduces the coordinate plane, for elementary and middle school students. With the help of Sam the Chameleon, learn to find points on a number line and graph points in the coordinate plane. See also Whitcher's companion units on Lines
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 Chance Encounters at ICME9  Cut the Knot!, Alexander Bogomolny
From the International International Congress on Mathematics Education held in Tokyo in August, 2000, impressions that came from personal, often unplanned, meetings with such mathematicians as N. P. Dolbilin (who outlined the history and the current state
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 CHANCE  J. Laurie Snell, Mathematics Dept., Dartmouth College
Materials designed to help teach a "Chance" course or a more standard introductory probability or statistics course. A Chance course is a case study quantitative literacy course designed to make students more informed and critical readers of current news
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 Chance Magazine  George P. H. Styan, Ed.; American Statistical Association & SpringerVerlag New York, Inc.
A magazine about statistics and its use in society. Information on recent issues and indexes; Available Data Sets, Articles, and Relevant Links; how to subscribe and submit articles.
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 Chance of Bank Balance $0.00 (Math Chat)  Frank Morgan, MAA Online
Answer to the Challenge: My colleague Dick De Veaux reports that upon returning from a threeweek trip, he found his checking account balance at exactly $0.00. Without further information, how would you estimate the probability of such an event?
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 Changes of Mathematical State [PDF document]  Ivars Peterson  Science News Online
A discussion of constraintsatisfaction problems, more specifically the logic puzzle in theoretical computer science known as the satisfiability (SAT) problem (e.g. working out a seating plan), the current state of research on computational "phase transitions,"
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 Change the Equation
This nonprofit, nonpartisan CEOled initiative aims to "solve America's innovation problem. It answers the call of President Obama's Educate to Innovate Campaign to move the U.S. to the top of the pack in science and math education," with science, technology,
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 Changing the Way We Teach Math  Kate Nonesuch
This document is a manual for teaching basic math to adults. It sets out some "best practices" from the literature, then outlines some difficulties instructors may face in implementing them, and makes suggestions for overcoming those difficulties. There
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 Channeling quantum information efficiently  Ivars Peterson  Science News Online
By carefully choosing how a message is encoded and decoded, it's possible to approach the theoretical maximum for transmitting information via photons or other quantum particles.
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 Chaos and Fractals  Joakim Linde; Chalmers Tekniska Högskola
A small fractal image gallery gallered with Fractus software, Fractint parameter files, a fractal icon archive, and links to other fractal sites.
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 Chaos and Fractals  ThinkQuest 1996
Chaos is an advanced field of mathematics that involves the study of dynamical systems or systems in motion. Chaos Theory consists of the mathematical proofs and theories that attempt to describe processes in motion. Think of any
mathematical system
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 Chaos and the Solar System  Paul Trow
An essay on the historical development of chaos theory, especially as it relates to the solar system.
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