 Conceptual Learning Materials  Conceptual Learning Materials, Inc.
Support materials intended to reinforce basic math concepts. Materials for teachers as well as students.
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 Conceptual Math Media, Inc.
Math educational products for both the classroom and family. Master multiplication facts and divisibility rules with PrimePak playing cards; create equations crosswordstyle with the Equate board game, also available via email. Order products online
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 Conceptua Math  Conceptua Math
A commercial company offering software and professional development for mathematics education. Fractions Tools, which consist of problems and standardsaligned lessons on fractions, are currently available for free. Accompanying Student Activities, which
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 Cone, Cylinder Edges?  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about whether cones or cylinders have edges, such as "Does a cone have an edge? A vertex?"
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 Cone Formulas (Ask Dr. Math FAQ)  Math Forum
Formulas for finding the height, surface area, and volume of a cone, right circular cone, or frustum of a cone.
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 Conference Board of Mathematical Sciences (CBMS)
The Conference Board of the Mathematical Sciences is an umbrella organization consisting of sixteen professional societies all of which have as one of their primary objectives the increase or diffusion of knowledge in one or more of the mathematical sciences.
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 Conferences on the Teaching of Mathematics (CTM) (Mathematics Archives)  Husch, et al., Editors
Currently includes presentations and contributed papers from the Fifth Conference on the Teaching of Mathematics held on June 2122, 1996 in Baltimore, MD and the Sixth Conference on the Teaching of Mathematics held on June 2021, 1997 in Milwaukee, WI.
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 Congruence Of Triangles  Jim Loy
A short introduction to equivalent side/angle theorems and congruence postulates in triangles.
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 Connect 4  Keith Pomakis
Play it on the Web, specifying your own parameters. The site includes the rules of the game.
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 Connect Capture Game  Rick Nordal
This paper and pencil game combines chess with dotsandboxes. Completing a box "activates" the enclosed chess piece, which may then capture other activated chess pieces for points.
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 Connected Mathematics Project (CMP)  Michigan State University
A project funded by the NSF to develop a complete mathematics curriculum for the middle grades (68), one rich in connections among the various topic strands of the subject, between mathematics and its applications in other disciplines, between the planned
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 Connected Mathematics Project Sketchpad Activities  Nathalie Sinclair, Michigan State University
Worksheets, sketches, and teacher notes for the Connected Mathematics Project curriculum (CMP). Developed by researchers from Michigan State University and KCP Technologies, who have surveyed Years 6 and 7 of CMP. Use the link at the bottom of the page
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 CONNECT: Everyone can do Math and Science  Colorado
Colorado's NSFfunded statewide systemic initiative in mathematics and science. CONNECT is charged to provide support and leadership to increase the achievement of all Colorado students in mathematics and science, kindergarten through baccalaureate (K16).
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 Connecting Mathematics  a Maths Thesaurus  University of Cambridge, U.K.
More than an alphabetical list of words and their definitions, this site has grown from a proposal made by the NRICH project at the University of Cambridge, to develop an online dictionary of mathematics to support its other online publications. The thesaurus
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 Connecting Mathematics to Our Lives  De Orilla a Orilla
Through bilingual discussions online, sister class partnerships, global data gathering, and other classroom collaborations at a distance, students explore how math is used in their families and communities; use math skills to investigate community or
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 Connect with Music  Finn, Rudolph, O'Malley, Frankel, Ordway, and Langol
Thirty free interdisciplinary lesson plans that use multimedia, music, and technology to aid in the instruction of Language Arts, Mathematics, and Science at the middle school level. Lesson plans include comprehensive scoring rubrics, links to standards
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 ConquerMaths  Generic Maths, Ltd.
Fully online mathematics teaching system. 482 lessons with worksheets and
tests for ages 11 to 16. Money back guarantee offered. Also available from MathsOnlineTutor.com.
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 Consortium for Mathematics and Its Applications (COMAP)
A nonprofit organization offering multidisciplinary and academically rigorous curriculum materials and teacher development programs based on mathematical exploration of realworld problems. Developers of the PBS television series "For All Practical Purposes:
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 Consortium for School Networking (CoSN)  Information Institute of Syracuse
A community of organizations, government agencies, corporations, and individuals in important leadership roles formed to further the development and use of telecommunications in K12 education. Topics include legislative issues, conference participants
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 Constant Perimeter and Constant Area Rectangles (Connected Geometry)  Daniel Scher; Education Development Center, Inc. (EDC)
Interactive Java animations accompany the article "Theorems in Motion: Using Dynamic Geometry to Gain Fresh Insights" by Daniel Scher in the April 1996 issue of the Mathematics Teacher. The article outlines how dynamic geometry software can be used to
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 Constants, Units, and Uncertainty  National Institute of Standards and Technology (NIST)
A reference with three sections: Fundamental Physical Constants (values of the constants and related information, and a searchable bibliography on the constants); the International System of Units (indepth information on the SI, the modern metric system),
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 Constructing Math Instruction  Chris Robinson
Blog by teacher "averse to binary thinking that refuses to countenance all the complexities of the minefield that is the real classroom." Posts, which date back to December, 2012, have included "Number Sense and My Students"; "Analyzing Student Questions";
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 Constructions with ruler and compass
 Zef Damen
A page that answers the question, What are rulerandcompass constructions? With links to stepbystep drawings for constructions: bisecting a given angle; constructing: a line perpendicular to a given line that divides it into two equal parts; a line
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 Constructivism and Education: A Shopper's Guide  Moses A. Boudourides
A brief review of the various streams of constructivism in studies of education, society, science and technology: philosophical, cybernetic, educational, and sociological. A paper presented at the International Conference on the Teaching of Mathematics
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 Constructivism and the Five E's: The pH Factor  Miami Museum of Science
Constructivism is a philosophy about learning which proposes that learners need to build their own understanding of new ideas. To introduce the pH factor to students in a constructivist way, the Miami Museum of Science adapted their "Seven Es" (Excite,
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 Constructivism  Classroom Compass
The winter 1994 issue of Classroom Compass explores this theory of learning, including a brief literature summary and suggestions for the constructivist classroom. Two instructional activities (Which Container Holds the Most? for younger children and
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 Constructivism in mathematics education  what does it mean?  John and Annie Selden; The Math Forum
A presentation given at the Joint AMS/MAA Mathematics Meetings, January 1996, Orlando, Florida. Includes an annotated bibliography: Kinds of Constructivism.
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 Constructivism in Science and Mathematics Education  Michael R. Matthews
Matthews discusses constructivism, its scope and influence, and looks at the particular case of New Zealand, in this article from the 99th Yearbook of the National Society for the Study of Education.
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 Constructivism in the Classroom  Mathematics Education at the Math Forum
The Math Forum's suggested sites on constructivism in math education, including projects and Web resources (conference sessions, articles, reports). See also our page of selected Internet sites with a constructivist orientation or that offer readings
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 Constructivist Mathematics and Unicorns  Lee V. Stiff
The thenpresident of NCTM lays out distinctions among various forms of constructivism, and how they relate to the Principles and Standards, in this 2001 article.
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 Constructivist Views of Learning in Science and Mathematics (ERIC Digest)  Drew K. Ishii
An examination of constructivism and its implications for the classroom, with web and print resources for additional study.
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 Constructor  Soda
Constructor animates and edits twodimensional models made out of masses and springs. The springs can be controlled by a wave to make pulsing muscles, and you can construct models that bounce, roll, walk, etc. Try some of the readymade models or build
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 Conteúdos Digitais em Matemática para o Ensino Médio  Kaleff, Ana Maria; and Humberto José Bortolossi  Universidade Federal Fluminense
Educational Java applets and lesson plans in Portuguese. Topics include real functions, algebra, permutations, polygons, tangrams, conic sections, solids of revolution, and other two and threedimensional geometry, which includes the Englishlanguage
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 Content Knowledge: The McREL Standards Database  Midcontinent Regional Educational Laboratory (McREL)
A compendium of standards and benchmarks for K12 education. Browse or search the standards, which treat subject areas from math and science to language arts and physical education (e.g. Mathematics Standards.)
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 Continental Mathematics League (CML)
Information about the Continental Math League, including samples and solutions from CMLs for grades two and three, Pythagorean for grades 49, Euclidean for grades 49, and calculus. Also, order Best of CML books containing questions, and obtain the competition's
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 Continued Fractions, Infinite Continued Fractions, and Iteration  Don Cohen, The Mathman
Ten different ways to solve a quadratic equation  an area of mathematics with applications to population increase, finding the square root of a number, chaos theory, and fractals. Sample problems from Chapter 8 (Solving Equations and Iteration) of Don
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 Conundrum Corner  UselessKnowledge.com
Math puzzles to solve, get the answers to, or send to friends. Also, Visual puzzles, Thinking puzzles, and other conundra.
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 Conversation about A Beautiful Mind, with Sylvia Nasar and Dave Bayer  archived by the Commonwealth Club of California
A conversation with Sylvia Nasar (biographer of John Nash) and
Dave Bayer (math consultant on A Beautiful Mind). Streaming audio
of event sponsored by MSRI that took place May 2002.
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 Conversion Factors  Washington State Department of Transportation
Conversion tables between U.S. customary units and SI (International System) units. The proper conversion procedure is to multiply the specified value on the left (primarily U.S. customary values) by the conversion factor exactly as given below and then
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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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 ConvertAuto.com  Lilly Hammond
JavaScript calclulators for instant online conversions: angles; area; cooking, such as teaspoons (tsp) and quarts (qts); foreign currencies; density; energy; force; frequency; fuel economy, such as miles per gallon (mpg); length; power; pressure; speed;
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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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 Converting Celsius To Fahrenheit (SMILE)  Amaechi Onyeali, Carter Elementary School
A lesson designed to teach students to solve multiplestep equations involving addition, multiplication, and division; convert a known temperature in celsius to an equal temperature in fahrenheit; and accurately read a thermometer in degrees celsius.
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 Converting Fractions to, from Decimals  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about converting fractions to decimals and back, including how to convert repeating decimals to fractions.
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 Converting Inches to Miles  NASA Lewis Learning Technologies Project
The scale on a road map is 1 inch = 250 miles, how many inches would represent 1250 miles? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Converting Tons to Pounds  NASA Lewis Learning Technologies Project
A loaded moving van weighs 5 tons. How many pounds would 10 loaded moving vans weigh? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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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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 Convertme.com  Mariya Voznesenskaya and Sergey Gershtein
Online converter of areas, capacities and volumes, circular measures, computer storage, currencies, distances and lengths, energy and work, fuel consumption, power, pressure, speed, temperatures, time, torque, weights and masses. Convertme.com offers
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 Cool Cosmos  Education and Public Outreach Group, Infrared Processing and Analysis Center and the SIRTF Science Center
To communicate the world of infrared astronomy to the public, the Cool Cosmos web site offers: classroom activities; infrared light lessons; infrared astronomy tutorial and timeline; multiwavelength astronomy; Ask an Astronomer; Cosmic Kids; image galleries,
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