 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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 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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 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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 Cast Your Vote! What's Your Opinion On Polling?  Annenberg Media
An exhibit that explores wellknown statistical concepts  random sampling, margin of error, and confidence  through activities where YOU play the pollster. Also included is a wealth of links to Web sites related to statistics. The exhibit is part of
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 CAUSEweb  Dennis K. Pearl, Director
The Consortium for the Advancement of Undergraduate Statistics Education (CAUSE) collects, reviews, develops, and disseminates resources for members of the undergraduate statistics education community. Resources include lesson modules for lecturers; computer
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 The Celestial Image of a Polyhedron (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
Using the celestial image of a polyhedron to get yet another proof of Descartes' angledefect formula. What pattern is traced out on the celestial sphere when you move a flashlight around on the surface of a cube, keeping its tail as flat as possible
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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 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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 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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 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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 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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 Chaos Under Control  David Peak, Michael Frame; Union College, Schenectady, NY
Material designed to support the text Chaos Under Control (W. H. Freeman, 1994): Macintosh software; course syllabi; six labs exploring natural fractals, iterated function systems, dimension computations, onedimensional dynamics, fractal analysis of
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 cheesemonkey wonders  Elizabeth Statmore
Blog by a San Francisco high school teacher who came to the classroom by way of "many years as an entrepreneur and executive in Silicon Valley." Statmore left industry after seeing "too many good, smart people who were missing out on wonderful career
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 Chess Math (SMILE)  Louis C. Jackson, Lincoln Elementary School
A lesson designed to reinforce students' knowledge of angles as they become chess
pieces on a floor chess board. From the Patterns and Logic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning
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 Chips A Tally  Bayonne, NJ Board of Education  5th Grade Teachers
A collaborative math project to determine whether the number of chocolate chips in Chips Ahoy cookies is the same everywhere. Classes may submit data, and results will be posted November 30, 2000. Site includes: lesson plans that use statistics to analyze
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 ChisenBop (or Chisanbop)  Andrew Harris, Computer Science, Indiana & Purdue Universities
An ancient technique from Korea, similar to the abacus or soroban: using your fingers as an analog computer, illustrated and with Real streaming media lessons. Background; simple counting; simple adding and subtracting; adding "around the corner"; subtraction
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 ChiSquare (MSTE)  Amar Patel; University of Illinois at UrbanaChampaign (UIUC)
This lesson illustrated using cartoon characters explains statistical terms such as expectation, significance, and chisquare. The lesson requires Excel and is based on Ch. 6 of Using Statistics, by Travers, Stout, Swift, and Sextro. Analyzing records
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 CIESE Online Classroom Projects  Stevens Institute of Technology
Projects that use realtime data available from the Internet, and collaborative projects that use the Internet's potential to reach peers and experts around the world. The site lists currently sponsored projects by level, with an archive of past sponsored
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 Circles  Diameter, Circumference, Radius and the Discovery of Pi (SMILE)  Kathleen Ryan, Randolph Magnet School
A 7th grade lesson designed to help students identify and measure the diameter, circumference, and radius of a circle. The students discover the approximate value of pi through the relation between the diameter and circumference. From the Geometry and
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 Circles in Geometry  Lesson Ideas: Math: Geometry; Teachnet.Com
Wholeclass and group activities for teaching circle concepts, pi, circumference, etc.
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 Circles of Light: The Mathematics of Rainbows  Frederick J. Wicklin, Paul Edelman; The Geometry Center
How are rainbows formed? Why do they only occur when the sun is behind the observer? If the sun is low on the horizon, at what angle in the sky should we expect to see a rainbow? This lab helps to answer these and other questions by examining a mathematical
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 Circles of Light: The Mathematics of Rainbows  Steven Janke; The Geometry Center
How are rainbows formed? Why do they only occur when the sun is behind the observer? If the sun is low on the horizon, at what angle in the sky should we expect to see a rainbow? This lab helps to answer these and other questions by examining a mathematical
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 Circumferences, Diameters, and Radii (SMILE)  Dwayne Belle, Fuller School
A lesson designed to teach students to measure circumferences in inches, and compute radii and diameters, given different circumferences. From the Geometry and Measurement section of a collection of almost 200 single concept lessons by the Science and
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 ClarisWorks Graphing: Spreadsheet Lessons  Suzanne Alejandre
Stepbystep directions for using ClarisWorks spreadsheets, helpful in exploring the differences between exponential functions and linear functions. Bar graphs, pie charts, pictograms, and other graphs for linear, polynomial, and exponential functions.
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 Classic Fallacies  Philip Spencer; University of Toronto Mathematics Network
Mathematical "proofs" demonstrating, among other things, that 1 = 2 and that all people in Canada are the same age. Each consists of several steps, and users search for the flaws. For every step there is explanation of why the flaw is or is not in that
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 Classification (SMILE)  Delores B. Wilburn, Shakespeare School
A lesson designed to motivate students to understand classification, and to teach decisionmaking, how certain objects relate to the number system, and the meanings of some words used to express mathematical ideas. From the Patterns and Logic section
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 Classroom Projects  TEAMS Distance Learning, Los Angeles County Office of Education (LACOE)
A site for teachers looking for a content area project or contest for the classroom. Join a TEAMS project or browse a list of projects and contests sponsored by other organizations. Extensive list of upcoming, current, ongoing, and completed projects
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 Cálculo Contractivo
In Spanish: Nuestro grupo de investigación se ha propuesto compartir conocimientos con aquellas personas que estén motivadas para el estudio de la matemática o que puedan interesarse en conocer métodos no convencionales en Cálculo Numérico ó en áreas
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 The CliffHanger (MSTE)  Nicholas Exner; University of Illinois at UrbanaChampaign (UIUC)
A Java simulation of statistics and probability. From where he stands, one step toward the cliff would send poor Homer Simpson over the edge. He takes random steps, either toward or away from the cliff. At any step his probability of taking a step away
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 Clocks and Curvature (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
The total curvature of any surface topologically equivalent to the sphere is 4 pi. This can be seen very simply from the definition of the curvature of a region in terms of the angle of rotation when the surface is rolled around on the plane; the only
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 CODEE Learning Assets Library  Consortium for Ordinary Differential Equations Experiments (CODEE)
Electronic versions of the 19921997 CODEE newsletters, which published pedagogical articles, lesson plans, computer experiments, and software reviews related to ODEs. The Consortium for Ordinary Differential Equations Experiments (CODEE) seeks to disseminate,
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 cognitive acceleration  Cognitive Acceleration Associates
Cognitive acceleration (CA) emphasizes "'big ideas' or organizing conceptual strands in mathematics, rather than procedures and algorithms." Published collections of math lessons include Thinking Maths, Primary Cognitive Acceleration through Maths Education,
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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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 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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 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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 Combining Science and Mathematics in the Classroom Using Spreadsheets  Dawn M. Laning
A lesson plan involving the use of spreadsheets to investigate data analysis techniques with a set of data gathered in a chemistry experiment. Writeup from a class in mathematics education given by J. Wilson at the University of Georgia, fall 1997.
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 Common Core Algebra II Statistics and Probability  Maryland Public Television
Modules of lessons enlivened by computer animations, journal prompts, interactive "check your understanding" selfassessments, and more: linear, quadratic and exponential regression; regression; standard deviation; inferences; probabilities of compound
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 Commutative, Associative And Distributive Properties (SMILE)  James E. Breashears, Robeson High School
A lesson designed to teach students to compute expressions like (56 + a) + 4 and (50 * 7) * 2; to identify the commutative and associative properties; and to rewrite expressions by using the distributive property. From the Algebra and Trigonometry section
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 Compare It!  Anne Moncure Elementary, Stafford, VA
Interactive quizzes designed to teach elementary school children about boolean operators greater than, less than, equal, and others using numbers, words, and objects.
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 Compound Interest to e and i  Don Cohen (The Mathman)
Graphing and exploring simple interest and compound interest. Examples of interest earned on one dollar at 6 percent compounded daily, monthly, quarterly, annually. Patterns, infinite sequence. Sample problems with some answers from Chapter 11 of Don
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 ComputerBased Calculus  Przemyslaw Bogacki, Gordon Melrose; Old Dominion University
Archives of the ODU Calculus Project project, which has the goals of enhancing students' graphical and numerical understanding of calculus, and making the software/hardware aspect of the course as transparent as possible. With access to the preliminary
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 Conception of the Good  Naveen Rizvi
"Insights into our current education system" by a UK classroom teacher. Rizvi, a selfdescribed "believer in teaching via direct instruction," blogs to "share ideas and model how I have implemented these ideas and then discuss the impact of the number
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 The Conic Sections in Polar Coordinates  David Arnold; Mathematics Dept., College of the Redwoods, CA
An interactive study of the polar form of the equation for a conic section, for readers familiar with polar coordinates and triangle trigonometry. This activity is also a vehicle for the introduction of the Geometer's Sketchpad, though no prior experience
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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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 Connecting Geometry  Cathleen V. Sanders
A fully credited high school distance learning geometry course offered via the Internet to students throughout the Hawaiian islands as part of a grantfunded pilot project through the Hawaii Department of Education. During this ESchool (electronic school)
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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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 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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 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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 Continued Fractions With A Calculator (SMILE)  Fred J. Schaal, Lane Tech High School
A lesson designed to teach students how to evaluate continued fractions by taking many reciprocals with a calculator. From the Arithmetic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning
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