 Collaborative Learning  Mathematics Education at The Math Forum
A collection of links to collaborative and cooperative learning resources on the Web, including articles, discussions, and teaching techniques that emphasize collaboration.
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 Collaborative Mathematics  Jason Ermer
Videos for connecting "a worldwide community of mathematical problem solvers" and "cultivating a productive attitude toward challenging problems: one of creativity, resourcefulness, selfconfidence, and perseverance." Two and threeminutelong challenges
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 Collaborative Maths Resources  Collaborative Learning Project
Freely downlaod PDFs of "talkforlearning" lesson plans such as "12 and 24 hour Card Sorting" (clock times), "Buy a Ted" (collect all the parts of a teddy bear, which introduces the concepts such as exact amounts and making change), "Factors Four in
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 The Collage Theorem  Cut the Knot!, Alexander Bogomolny
To find an IFS whose attractor is "close to" or "looks like" a given set, one must endeavor to find a set of transformations  contraction mappings on a suitable set within which the given set lies  such that the union, or collage, of the images of the
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 The Collapsing Compass  Godfried Toussaint
There has been considerable interest during the past 2300 years in comparing different models of geometric computation in terms of their computing power. One of the most wellknown results is the proof in 1672 due to Mohr that all constructions that can
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 Collatz 3n+1 Problem Structure  Ken Conrow
Pages of observations posted to stimulate further research.
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 Collatz Conjecture Calculation Center  Klaas IJntema
JavaScript tools to investigate the Collatz problem, as well as general mathematics tools and some recreational mathematics. Some programs are freely downloadable.
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 Collecting Data and Graphing (SMILE)  John Ramsey, Jr., Teacher's Academy For Math and Science
A multilevel lesson designed to teach students to see the relation of a student's arm span to his or her height; compare data with classmates; construct a graph and plot data; work in pairs cooperatively; learn to use a meter stick; and count the number
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 A Collection of Applets  Sione Palu
Java applets for classroom use. Those created so far include: Polynomial Roots; Frequency Distribution; Completing the Square; Polynomial Fitting; Statistical Analysis; Number Works; and Polynomial Differentiation. Read about Palu's background and educational
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 A Collection of Assessment Strategies  Alaska Department of Education & Early Development
Each section of this page describes and analyzes a particular type of assessment strategy, then lists sources of further information. Following those discussions, samples show how each type of strategy might be used at various grade levels. The given
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 The Collection of Computer Science Bibliographies on Mathematics  AlfChristian Achilles; Computer Science Bibliography Collection
A collection of bibliographies of scientific literature in computer science from various sources, covering most aspects of computer science. Math journals range from Mathematical Physics to the Mathematics of Computation to Applied Mathematics and Computation.
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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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 College Algebra  Marsha Austin, Oklahoma City Community College
A college algebra course to provide students with an understanding of the general concepts of relation and function and specifically of polynomial, exponential, and logarithmic functions; with the ability to solve system of equations by utilizing matrices
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 College Algebra Online  University of North Carolina, Wilmington
An introduction to the online version of the College Algebra course offered by Jeff Brown at UNCW. Information on the course content and structure is available here. Guests may view selected lessons from the course, with Java interactive activities, illustrations,
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 College Algebra PowerPoint Presentations  George Mathew
Free PowerPoint presentations on topics in early college algebra.
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 College and University Level Mathematics  Math Forum
Selected Internet resources for College students: links to Opportunities for undergraduate research; Internet activities and projects; Mailing lists and newsgroups; Organizations and departments; Professional services, address lists, etc.; Publications;
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 College Board Online  ETS
Sample tests and autoscoring questions; autoreplying financial aid worksheets; dowloadable AP course descriptions; online SAT registration, education materials shopping; announcements; career, scholarships, college searchers; bimonthly net tips; maintained
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 CollegeCram.com  The Smartacus Corporation
Feebased service providing tutorials on a number of topics including math, generally at the early college level. Tutorial topics are visible without a subscription.
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 College Entrance Exam Math Prep  EduCAD
A free, interactive library of the most complex math problem types found on the SAT® or ACT® college entrance exams. The "show next step" button provides a hint about the strategy to take; a correct answer submitted with the "check answer" button
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 CollegeLevel Geometry  Math Forum
Links to some of the best Internet resources for college geometry: classroom materials, software, Internet projects, and public forums for discussion.
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 CollegeLevel Standards and Guidelines  Mathematics Education at the Math Forum
The Math Forum's suggested sites on standards in college math education, including links to standards on the Web, sessions at conferences, and reports.
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 College Mathematics Journal Topic Index, 19701997 (MAA)  Mathematical Association of America
All main articles from the College Mathematics Journal are listed in the ERIC database, with short abstracts. They may be searched by author, title, or keywords.
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 College Math Prep for High School Students  C. J. Kentler and V. S. Manoranjan, Washington State University
Selfscoring problems, new with every click, to gauge a student's preparedness for college level math: operations, solving for a variable, solving linear equations, word problems, solving absolute value equations, solving inequalities, distance between
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 College Physics for Students of Biology and Chemistry  Kenneth R. Koehler
A hypertextbook written for firstyear undergraduate physics students, emphasizing human physiology and how the physics of the system affects its chemical and biological behavior. Nine chapters, with problems, cover mechanics, fluids, electricity, magnetism,
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 College Preparatory Mathematics (CPM): Change From Within  Smart Catalog
Description of a high school mathematics curriculum that replaces the current, standard collegepreparatory math program with a rich problembased, integrated curriculum.
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 College Teachers  Math Forum
Selected Internet resources for college professors: classroom materials, math projects, sites, and software for your classroom; workshops, research programs, articles and publications, professional organizations professional services, and math typesetting
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 Colm Mulcahy
Blog by a recipient of the Mathematical Association of America's Allendoerfer Award for excellence in expository writing. Posts, which date back to October, 2012, have included "Weak Math? Try Math Week!" and "Oranges and Apples Comparisons: The Roots
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 Colorado Model Content Standards for Mathematics
A detailed description of the model content standards for mathematics that were adopted in Colorado in 1995. Standards are provided with an explanation, a rationale, and specific information about the expectations of students in grades K4, 58, and 912.
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 Colorful Mathematics  Claude Laflamme
An educational software series presenting advanced mathematical concepts to K12 students in a gameoriented approach. The five games offered use simple coloring and/or drawing techniques to illustrate mathematical concepts from graph theory. Downloadable
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 Coloring Penrose Tiles  Ivars Peterson (MathTrek)
One set of Penrose tilings consists of a pair of diamondshaped figuresone fat and one skinny. Attempts to color such Penrose diamond tilings led some people to conjecture that three colors suffice. Now, mathematicians Tom Sibley of Saint John's University
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 Coloring (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material on coloring problems, including the Four Color Theorem and other graph coloring problems.
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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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 Colors of Math  Ekaterina Eremenko Films
Credits, still images, and trailer of a documentary film that features six mathematicians discussing math "in the context of the five senses" of sight, sound, smell, taste, and touch. The Courant Institute of Mathematical Sciences New York University
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 Columbus State University Math Contest  David Rock and Doug Brumbaugh, College of Education, Columbus State University
Problem of the Week, Algebra in Action, Middle School Madness and Elementary Brain Teaser  all available in "challenge" mode. Past problems are archived, with solutions available upon request.
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 Com2MaC: Combinatorial and Computational Mathematics Centre  Pohang University of Science and Technology, Korea
An integrated mathematical research center conducting research in various areas of mathematics and its applications relevant to the information and communication technology necessary for the nextgeneration industrial competitions. Basic research, educational
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 CombinaTexas: Combinatorics in the SouthCentral U.S.  Texas A&M University
Web pages for conferences, with contact information.
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 Combinatorial Figures  Robert M. Dickau; Math Forum
Mathematica pictures that are interesting for elementary combinatorics. Catalan number diagrams; permutation diagrams; derangements; shortestpath diagrams; Stirling numbers of the first and second kind; Bell numbers, harmonic numbers and the bookstacking
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 Combinatorial Games  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A collection of interactive combinatorial games, many implemented in both normal and misère versions, including by Kayles, Nimble, and Northcott; variants of Nim, such as Wythoff's Nim; OnePile and TakeAway games; a subtraction game, a fraction
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 Combinatorial Games Page  Erik Demaine
A combinatorial game usually involves complete information, with no hidden cards and no random randomness  a pure strategy game. Demaine has researched combinatorial puzzles such as Tetris, Clobber, Phutball, Pushing blocks (puzzles involving a robot
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 Combinatorial Game Theory  David Eppstein, Theory Group, ICS, UC Irvine
A list of links to materials on the Web. Combinatorial Game Theory studies strategies and mathematics of twoplayer games of perfect knowledge such as chess or go (but often either concentrating instead on simpler games such as nim, or solving endgames
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 Combinatorial Geometry (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material consisting of problems in which one starts with a geometric figure (say a polytope) but then considers abstract incidence properties of it rather than its metric properties. Most tiling and coloring problems
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 Combinatorial Mathematics Society of Australasia (CMSA)
Information for members of a society formed to facilitate, encourage, foster and cherish the branch of mathematics known as combinatorics throughout Australia, New Zealand and their neighbouring countries. Rules; members; minutes of meetings; annual general
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 Combinatorial Object Server (COS)  Frank Ruskey; Dept. of Computer Science, Univ. of Victoria, B.C., Canada
Specify a type of combinatorial object, together with specific parameter values, and COS will return to you a list of 200 such objects. Generation pages: permutations, combinations, various types of trees, unlabelled graphs, linear extensions of posets,
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 Combinatorica  János Bolyai Mathematical Society, SpringerVerlag
An international journal that publishes research papers in English in a variety of areas of combinatorics and the theory of computing, with particular emphasis on general techniques and unifying principles.
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 Combinatorics and Graph Theory  Department of Mathematics, Umeå University, Sweden
Home page of the Combinatorics Group. Members and research projects, seminars, archives of downloadable software, combinatorial and graph theoretical data, and preprints.
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 Combinatorics  Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to combinatorics, loosely the science of counting, studying families of sets (usually finite) with certain characteristic arrangements of their elements or subsets, and asking what combinations are possible,
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 Combinatorics (Graphics Archive, Special Topics)  The Geometry Center
Enumeration problems, and other problems involving counting, including meanders.
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 Combinatorics (MathPages)  Kevin Brown
About 40 "informal notes" by Kevin Brown on combinatorics: Dedekind's problem, cumulative permutation sequences, the factorial number system, Hardy and Ramanujan on partitions, solving magic squares, collecting k complete sets of coupons, and many more.
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 The Combinatorics Net and Annals Of Combinatorics  Bill Chen
Links to combinatorics articles, groups, conference reports, seminars, journals, books, typesetting and graph drawing, software, preprints, open problems, research announcements, news and stories, and related sites. The Annals of Combinatorics publishes
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 Combinatorics, Probability & Computing  Cambridge University Press
Now published bimonthly, the journal covers combinatorics, probability theory, and theoretical computer science. Topics covered include classical and algebraic graph theory, extremal set theory, matroid theory, probabilistic methods and random combinatorial
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