 Canadian Mathematical Society (CMS)
The mission of the CMS is to promote research in mathematics; to assist in improving the teaching of mathematics in Canadian universities, colleges and schools, and to encourage and assist in the development of mathematics and mathematics education. Publications
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 Canadian Mathematics Education Study Group  David A. Reid, Acadia University
CMESG is a group of mathematicians and mathematics educators who discuss mathematics education issues at all levels of learning. The aims of the Study Group include studying the theories and practices of the teaching of mathematics, and exchanging ideas
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 Canadian Operational Research Society (CORS)
Société Canadienne de Recherche Opérationnelle (site is in French and English). Past issues of the CORS Bulletin; information about careers in Operational Research, prizes and awards, conferences, speakers, related sites, a history
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 Canadian Society for the History and Philosophy of Mathematics (CSHPM)  Glen Van Brummelen, SecretaryTreasurer
Promotes research and teaching in the history and philosophy of mathematics. A History and Pedagogy of Mathematics Newsletter is free to members; back issues of the HPM Newsletter are available in WordPerfect format. The CSHPM Bulletin, with announcements,
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 Canberra Mathematical Association (CMA)  Faculty of Education, University of Canberra
A professional body with the following aims: to act as a lobby for mathematics educators in the ACT; to help keep teachers up to date; to encourage teachers to be lifelong learners; to network teachers across schools and sectors; to foster the love of
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 Cancer & Mathematics (MSTE)  Dildine, Silver; University of Illinois at UrbanaChampaign (UIUC)
An Internet Adventure into Cancer, Pattern Recognition & Image Analysis, and Geometry. Cancer is a group of diseases in which some body cells change their nature, start to divide uncontrollably, and may revert to an undifferentiated type. This lesson
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 Candy Byte Software  Nily Aharon
Mathamagica, for ages 711, provides rigorous math skill practice within an animated, interactive setting with colourful graphics and characters. Concepts include addition, subtraction, multiplication, division, sequences, greater than/less than, telling
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 Candy for Everyone  Ivars Peterson (MathTrek)
Several students are sitting in a circle. Each student has an even (though not necessarily the same) number of wrapped pieces of candy. On a signal, each student passes half of his or her trove to the student on his or her right. Between signals, the
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 Can i play this at home  Greg Pallis
Free online math drill games set in the soccer context of the 2010 FIFA World Cup. Select any of the 32 participating nations, then convert goalscoring chances before time expires in your group matches and elimination brackets by correctly answering
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 The Canonical List of Math and Jokes  David Ni
A searchable archive of jokes and other humor on general mathematics, proofs, statistics and statisticians, and mathematicians. Also, poetry and quotes.
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 Canterbury Mathematical Association (CMA)  Christchurch, New Zealand
Encourage and supports the teaching and learning of mathematics. Current events and issues; articles and reviews; teaching ideas; student work; information technology.
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 The Cantor Set  Math Academy Online/Platonic Realms
An article describing a paradox of infinite sets in measure theory.
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 Cantor's Theorem  Math Academy Online/Platonic Realms
An article describing Cantor's diagonal argument, which proved that infinity comes in many different sizes.
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 Can You Crack the Enigma Code?  Richard Belfield
The official website accompanying Belfield's book, Can You Crack the Enigma Code? "As part of the book, Richard invited a team of experts from the Information Security Group at Royal Holloway, University of London, to create a challenging collection of
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 CapJaxMathFax  Jack Fretwell, Starboard Training Systems
Commercial software for drilling math facts. Defines "knowing" a math fact as getting it on the first try within 3 seconds. Presentation software with a patented rating system turns learners' efforts into a challenging game with 400+ math facts. Includes
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 Captain Astounding's Nightclub  Dan Welchman
A series of books set in a nightclub, the first of which discusses the practical applications of raising a number to the second, third, fourth and fifth powers. Other topics forthcoming, including "The Probability." The books concentrate on the real meaning
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 Car Budget Activity  Lawrence Klepinger
A handout from The Internet TESL Journal, Vol. III, No. 7, July 1997 (English as a second language). The activity can easily be adapted for different countries and is designed to show the importance of good budgeting and basic common sense when planning
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 Card Colm  Colm Mulcahy
This blog "explores mathematical card principles and effects for fun." Inspired by Martin Gardner and his seminal Mathematics, Magic and Mystery, Mulcahy has posted since August, 2011: "A Call For A New Shuffle Principle (Need Rot Sextet?)," "Splitting
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 Card Games  John McLeod
Rules and information, including probabilities, about card and tile games. Indices by alphabetical order, classified by mechanism and by objective (including a list of children's games), arranged by country and the types of cards. Also, commercial, solitaire,
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 Career.edu: Job Board for the Academic and Research Community
Nonprofit job board for the academic and research community. Many academic positions in math, physics, and astronomy.
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 Career Information (SIAM)  Society for Industrial and Applied Mathematics
Examples of questions addressed by applied mathematics  whether genetic engineering, designer drugs, diesel engines, digital TV, financial markets, paper mills, electric power, insurance rates, inflation statistics, computer chips, compact disks, credit
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 Career Network  The Chronicle of Higher Education
Faculty and research positions in mathematics: new job announcements from the latest issues of The Chronicle, plus other information useful to people pursuing careers in higher education. The Chronicle also offers email notification of new job openings.
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 Career Profiles 
AMSMAASIAM Mathematical Sciences Career Information Project
Mathematicians at work: practical answers to the question, Why should I study math? More than 40 short essays written by math majors around the country about the types of work they are doing after having received their undergraduate or graduate degrees.
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 Careers in Mathematics  Department of Mathematics, Purdue University
A compilation of online career resources available to students, both undergraduates and graduates. What Can You Do with a Math Degree? Just what do mathematicians do? Also, resources and FAQs for finding jobs in mathematics, matriculating to a graduate
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 C.a.R. Geometry Program  Rene Grothmann
A dynamic geometry program that simulates constructions with a ruler and compass (Compasses and Ruler). C.a.R. runs on Java as a local application, with Java Web Start, or as an applet in browsers. The free and open source program includes documentation
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 Carl Bialik
Author of "The Numbers Guy," a weekly column on "how numbers are used and misused in the news, business and politics," for the Wall Street Journal Online. Read past columns, such as "Putting a Number on Happiness," "Lightning Stats Are Partly Cloudy,"
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 Carl Eberhart
Class information and/ or Maple worksheets for courses including multivariable calculus, linear algebra, linear programming, differential equations, numerical methods, and topics for mathematics teachers, as well as Maple and C++ programs for a course
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 Carlo Emilio Bonferroni  Michael Dewey, University of Nottingham
A brief description of Bonferroni's life and works, including Bonferroni's inequalities and his interest in algebraic means. With bibliographies.
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 Carl Offner's Home Page  University of Massachusetts, Boston
Expository papers by Offner on mathematics and computer science (levels: advanced undergraduate to 1styear graduate student): Repetitions of Words and the ThueMorse Sequence; Finite Fields and PseudoRandom Number Generation; Some Early Analytic Number
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 Carlson's Fractal Gallery  Paul Carlson
Fractal images in the following categories: 3D Phoenix Spirals; Atan Method (produced by a variety of methods, mostly transcendental functions); 3D Stalks (produced by a variation on a method by Clifford Pickover); Bubbles (standard Mandelbrot); Pokorny
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 Carl's Teaching Blog  Carl Oliver
Blog by a New York City transfer school teacher "documenting the steps I take, and the progress I make, towards becoming the best teacher I can be." Posts, which date back to April, 2014, have included previews of Oliver's lessons for the week and "Carl's
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 Carnegie Foundation for the Advancement of Teaching
An independent policy and research center improving teaching and learning. See in particular Quantway® and Statway®, the foundation's developmental math pathways for community college.
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 Carnegie Learning
A suite of Cognitive Tutors for Algebra I, Geometry, Algebra II and College Algebra. Each course combines computers and paperbased components with professional development, assisting students while ensuring an important role for the teacher. These products
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 Carol Hurst's Children's Literature Site  Hurst, Otis
A collection of reviews of books for kids, ideas of ways to use them in the classroom, and collections of books and activities about particular subjects, curriculum areas, themes and professional topics. Ideas for teachers, librarians, home schoolers
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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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 Carousel Math  Web Feats Workshop II
Carousels are as reliant on the laws of motion as roller coasters. Let's take a ride on the new Bear Mountain Carousel at Bear Mountain State Park in New York. After enjoying the ride, take the data that has been collected and use the applet to explore
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 Carousel Numbers. A Leadin to Number Theory  Gary Klatt; Univ. of Wisconsin  Whitewater; The Math Forum
A connected series of four problems in elementary number theory that are ideal for discovery learning at several levels. Each problem generates interesting questions and conjectures, and their surprising connections add interest and allow each to shed
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 The Carpets Theorem  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
An intuitively obvious fact that the area of a carpet is equal to the area
of the floor beneath admits several reformulations and nontrivial
consequences, some of which are discussed and dynamically illustrated at
the site.
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 CarQuiz  Smile More Studios
Tablet game app for practicing basic operations. Designed by a fatherdaughter team, CarQuiz presents 30 arithmetic problems over the course of three race laps. Steer the game car by swiping left or right to drive under the lane corresponding to the correct
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 CARROLLIA  Mensa España  CarrollSIG
El órgano de comunicación del CARROLLSIG de Mensa España, que se dedica a las matemáticas recreativas, la lingüística, la literatura experimental, la lógica, la ciencia, y todo aquello que hubiera gustado
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 Carroll's Paradox  Math Academy Online/Platonic Realms
An online encyclopedia article on Lewis Carroll's paradox, in Charles Dodgson's Alice in Wonderland.
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 CarrotSticks Online Math Games  CarrotSticks
This online multiplayer game lets kids practice the four basic operations of addition, subtractions, multiplication, and division  or compete with classrooms and other peers around the world, headtohead, in real time.
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 CARTESIO  Camillo Trevisan
An educational computer graphics program for Windows and Macintosh, providing an understanding of the geometric configuration of projections (for example, the positions of the projection plane and viewpoint relative to the Cartesian axes).
All projection
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 Cartesio  Camillo Trevisan
CARTESIO is an educational computer graphics freeware program for high school and college students exploring and analyzing geometric projections and CAD (computer aided design) principles. Site is in Italian and English, with links to the author's homepage
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 Cascade Math Systems  Cascade Math Systems LLC
Narrated screencasts of a multisensory approach to reviewing or refreshing understanding of patterns, whole numbers, fractions, integers, and more. See also Cascade Math's YouTube channel.
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 The Case Against Block Scheduling  Jeff Lindsay
An analysis and opinions. Sections include: Nature of the Problem, reviews of case studies (including Bateson's Canadian studies), Advantages of Block Scheduling, Suggestions for Improved Use of Time, Comments From Around the Country, Questions to Ask
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 Case Studies Index  SyllabusWeb
A case study index from A to Z on technology innovation taking place in high schools, colleges, and universities throughout the world, with current studies and text archives.
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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 Education  Casio America, Inc.
Calculators, technology, lesson library, activities and sample questions, and other calculator resources for grades K through college. See also Casio's news and events, testimonials, and customer
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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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