 The Center for Game Science
Makers of free online fraction games such as Treefrog Treasure, Refraction, and Creature Capture. The Center for Game Science also offers its research publications on science, technology, engineering, and math (STEM) games for scientific discovery; for
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 Center for Improved Engineering and Science Education (CIESE)  Stevens Institute for Technology
CIESE's mission is to catalyze and support excellence in teaching and learning of science, technology, engineering, mathematics (STEM) and other core subjects through innovative, researchbased instructional strategies and use of novel technologies. CIESE
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 Center for Innovative Learning Technologies (CILT)
Joining forces and leveraging resources to improve K14 education. Four theme areas have been defined as initial opportunities, with a "theme team" for each. Teams meet annually with the best minds in their fields from Industry, Research, and Schools
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 Center for Inquiry Based Learning  University of Michigan
Promoting "the teaching and development of inquirybased learning in mathematics." See, in particular, the Center's descriptions of undergraduate math and math education courses.
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 Center for International Earth Science Information Network (CIESIN)  Columbia University
A nonprofit, nongovernmental organization providing information to help scientists, decisionmakers, and the public better understand their changing world. CIESIN specializes in global and regional network development, science data management, decision
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 Center for Mathematical Talent  New York University
The Center for Mathematical Talent (CMT) at the Courant Institute of Mathematical Sciences coordinates activities for students in the New York City area who would like more mathematics than is included in the usual mathematics classroom. Freely downloadable
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 Center for Science, Mathematics, and Engineering Education (CSMEE)
The Center provides a single location for several significant programs in education, namely the Mathematical Sciences Education Board (MSEB), the Board on Engineering Education (BEEd), the Committee on Science Education K12 (COSE K12), and the Committee
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 Center for Science & Mathematics Teaching (CSMT)  Tufts University
The Center, directed by Ronald Thornton, develops curricula, activities, and computer tools which allow students to participate actively in their own learning and to construct scientific knowledge for themselves, learning directly from the physical world.
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 The Center for Talented Youth (CTY)  The Johns Hopkins University
A universitybased initiative that promotes the academic experience of children with "extraordinary mathematical ability" worldwide. Links include opportunities for homeschoolers, summer and academic year educational opportunities, distance learning,
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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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 Center for the Development of Teaching (CDT)  Education Development Center, Inc. (EDC)
A research and development center whose goal is to learn how teachers' practice can be transformed to support students' construction of knowledge. Currently focusing on mathematics and science teaching, the Center carries out research and action projects
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 Center of Excellence for Science and Mathematics Education (CESME)  University of Tennessee, Martin, Tennessee
A site designed to serve as a starting point for teachers who are looking for resources to improve their science or mathematics teaching. CESME Resources and Projects include Mathematics Activities Guides (PDF format) and the Tennessee Mathematics K8
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 Center on Education and Work (CEW)  School of Education, Univ. of WisconsinMadison
The Center provides leadership in identifying and responding to issues affecting the connections among education, work, community and the family. Special focus on initiatives in the areas of SchooltoWork, Tech Prep, and Coordinated Workforce Development.
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 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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 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 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 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 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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 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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 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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 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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 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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 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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 Chaoscope  Nicolas Desprez
Software to render 3D strange attractors such as IFS, Julia, Lorenz, and pickover. Browse the gallery, participate in the monthly contest, check the freeware's manual, learn from tutorials. Also available at http://www.btinternet.com/~ndesprez/.
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 Chaos Demonstrations  Michael Cross
Two versions each of three Java applets  an "old, stable" version and a "new, trial" version for the Period Doubling Route to Chaos, the Lorenz Attractor and the Butterfly Effect, and Chua's Circuit. Created for an introductory course on Chaos at Caltech
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 Chaos Downloads (Chaos: The Software)  Gordon, Rucker, Walker; Autodesk, Inc.
A shareware release of James Gleick's CHAOS: the Software. Both the complete executable and the source code are provided. The program runs under Windows as a fullscreen DOS session. Six modules include the Mandelbrot set, Pendulum and Magnets, Strange
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 Chaos, Dynamic Systems, and Fractal Geometry  Tyeler Quentmeyer, ThinkQuest 1996
An educational Web page whose purpose is to make learning many of the complicated theories and ideas behind the theory of chaos, dynamic systems, and fractal geometry easier and more fun. It approaches problems from many different angles and gives users
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 The Chaos Experience  ThinkQuest 96
An explanation of the basic principles behind chaos theory, and a demonstration of its use in everyday life.
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 Chaos, Fractals, and Arcadia  Robert L. Devaney; Dept. of Mathematics, Boston University
An animated description of some of the mathematical ideas lurking in the background of Tom Stoppard's play Arcadia. Introduction; Thomasina's Geometry of Irregular Forms; The Chaos Game; The Sierpinski Hexagon; Thomasina's Fern; Valentine's Grouse; Summary
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