 Becoming the Math Teacher You Wish You'd Had  Tracy Zager
Blog by a math teacher in Maine. Posts, which date back to October, 2014, have included "The Structure of Popovers," "Elementary Teachers as Math Learners," "Making Sense," "The Same Amount of Tall," and "Maya and Daphne Find Math in Their World."
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 Beestar  Beestar Educations, Inc.
Beestar offers curriculumbased online programs for school kids. They include Math, English Language Arts (ELA), Science, and GT (Gifted & Talented) Math exercises. After the initial signup, every semester you can register your child to a weekly math
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 Beestar.org  Beestar Educations, Inc.
Providers of curriculumbased online programs for students, such as Beestar Progressive Exercise (BPE), a "systematic knowledge application and skillpractice program." See, in particular, the weekly math program; and dozens of freely downloadable sample
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 BeiupMathsBacBrevet  Davy Rigaux
Maths, exercises, lessons, forum, chat... all in French.
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 The Benezet Centre  Richard Hake & Sanjoy Mahajan
In 1929, Louis Benezet tried an experiment, "abandoning all formal instruction in arithmetic below the seventh grade and concentrating on teaching the children to read, to reason, and to recite." The experiment was successful; this site includes Benezet's
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 Beyond Traditional Math
Blog by a teacher who "was appalled to be handed a math book in which all instruction was whole group," and who subsequently "went on a mission to change and move beyond that traditional model of math in the elementary classroom." Subtitled "Fostering
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 Bibliography by Topic of the Mathematical Sciences in the Medieval Islamic World  Jeff Oaks
An online bibliography of medieval Islamic mathematicsover 1000 articles and books listed by topic. Restricted to works published since 1950 in western European languages. Reviews are also included. Mathematics in medieval times included more or less
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 Biglearners  Biglearners LLC
Thousands of math worksheets, organized by grade. Subscribe for answer keys and unlimited access free of advertisement.
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 The Big List of Puzzle and Riddle Pages  MindBreakers Associates Inc.
An annotated list of links to sites with collections of math and word puzzles; also the best puzzles (the files), ranked for coolness and difficulty, with solutions and discussion: Gold for free; Just draw a line...; Turn on a lightbulb; the Wizard and
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 Big Math Attack!  Educational Software
For PCs, this game includes math solving and metric conversion as well as spelling and typing skills practice. (Spelling section is customizable.) Downloadable evaluation copy available in several versions.
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 BizWorld: Real World Math
BizWorld is a real world math program in which students apply their schoolwork to the world of business. Handson activities correlated to National math, economic and social studies standards, lead students through the steps of starting and running businesses.
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 B.J. Pinchbeck's Homework Helper  Bruce P. Pinchbeck and B.J. Pinchbeck
In 1996, when he was 10, B.J. (and his father) began compiling links to educational websites. The site has grown to conclude hundreds of sites that will help you with your homework, including a page of annotated sites for math and another for computer
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 Books By Alma.com  Alma Longsworth
Math books for use in the classroom or at home.
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 BrainBashers  Kevin Stone
Five math or logic challenges on a page, each with clickable hints and solutions. For games, visit http://www.brainbashersgames.com/.
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 Brain Boosters  Discovery Education
An archive of challenging puzzles, organized under: Categorization, Lateral Thinking, Logic, Number and Math Play, Reasoning, Spatial Awareness, Word and Letter Play.
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 Brainingcamp Educational Math Software  Dan Harris, President and CEO
Real math problems and simulations for 5th9th grade. Middle school math online software. Guided by NCTM and State mathematics standards. Video demo and free trial available.
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 Bridging Math  Jennifer Bell
Blog by a K5 math coach in the Pacific Northwest. Posts, which date back to July, 2015, have included "#TMC15 Recap," "K12 Fraction Fun," "Choral Counting in Kindergarten," "#OML16 Recap," and "Number Talks and #ObserveMe." Elaborating on the name of
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 Bridging The Gap  Nicora Placa
Blog by a former elementary and middle school math teacher pursuing a Ph.D. in teaching and learning. Posts, which date back to April, 2013, have included "The subway ad that changed my life," "Transforming the Teaching Profession: It starts with RESPECT,"
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 Buzzmath  Scolab Inc.
Website and mobile application for learning and practicing middle school mathematics skills. Buzzmath promotes mastery through immediately detailed feedback and randomly generated values that allow learners to retry missed problems. Register for student
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 Calculators OnLine Center: Part II  Mathematics  Martindale's Reference Desk
Over 7,420 calculators for: Unit Conversion (Time, Distance, Length, Speed, Weight, etc.); Abacus; Basic Math; Complex Mathematics; Complex Math Education; Complex Math Calculators by Specialty: Algebra and Linear Algebra; Algorithms; Calculus; Central
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 Camping in the Redwoods  Joan Callaway
Math questions based on a visit to see the California redwoods. Part of a sample lesson for the 6th grade "Staying in Shape... Mathematically," one of three ...Ellipsis Middle School Math Summer Practice Programs. An order form for the full set is provided.
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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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 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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 Carré d'As  Carré d'As
Mathématiques amusantes pour vous détendre: questions et solutions, challenges, la question des champions (qui sera remplacée quand 20 internautes auront réussi à trouver la solution avec une démonstration correcte dès le premier essai), et 229 questions
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 cavmaths  Stephen Cavadino
Blog by a maths teacher and KS5 coordinator. Posts, which date back to July, 2012, often incorporate social media and snapshots of scratch work: "Christmaths Projects," "Engaging with Written Feedback," "Consistency, Humour, Well planned Lessons and
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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 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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 CESAME Support Site for Investigations Discussions  CESAME, Brown University, Math Forum
A place to share ideas, questions, and experiences from teaching TERC's Investigations in Number, Data and Space at four levels: Grades K1; 23; 45; and Special Needs Students. Discussion archives are searchable and browseable, and you may also join
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 Charlie's World  Buildcontent.Com
A searchable database of hundreds of links to educational content. Math resources include interactive movies, slide shows, Java applets and more. Topics include numbers, statistics, geometry, fractions and so on.
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 Chinese Numbers  Erik E. Peterson
Convert arabic numerals up to 1 billion into Chinese numbers, or show the value of a Chinese number (type or paste in a number in Chinese and click "Show English." With, in addition, A Brief Description of the Chinese Number System, and links to related
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 Cignition  Cignition, Inc.
Makers of Fog Stone Isle and other immersive online virtual worlds for computational fluency and conceptual understanding of mathematics.
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 ClassK12.com  LogTera
Online adaptive math apps designed for distributed practice. Aligned to the Common Core State Standards (CCSS), ClassK12's K5 gamebased interactive environment and visual models reward students with points and badges. Freely access worksheets and practice
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 Classroom Books and Libraries: Math  Attanasio & Associates, Inc.
The mathematics selection from this vendor of classroom libraries and books, which include Big Al and Shrimpy, It's about Time, My Very First Book of Shapes, The Shapes We Eat, How High Can a Dinosaur Count?, Everyone Uses Math, Pigs on a Blanket, Underwater
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 ClassteacherCTLS
Short instructional math videos from the YouTube channel of Classteacher Learning Systems, the makers of iPerform and other interactive classroom technology: Counting Numbers, Decimal Fractions, and more.
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 ClassZone  McDougal Littell, Publishers
In ClassZone, McDougal Littell has gathered together all of its activities, interactive online resources, research links, chapter quizzes, and other materials that support its popular middle and high school mathematics textbooks, such as Integrated Math
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 Cleave Books
Teacher Resources on Line (TRoL) include downloadable grid paper; Ttiles; dictionary exercises; shapes Bingo; MisMaths, an annotated collection of innumeracy and other math mistakes in news headlines; fact sheets; tables; formulas; a mathematical vocabulary
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 CMP Unit Organizers  Art Mabbott
To introduce students to new units from the Connected Mathematics Project (CMP), Art Mabbott has developed a set of Unit Organizers. Adapting work done by B. Keith Lenz, of the University of Nebraska, Mabbott has also shared his MS Word documents with
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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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 Common Core Math  New Jersey Center for Teaching & Learning
Freely downloadable teacherdesigned units consisting of one to two hundred Interactive White Board (IWB) presentation slides: each of grades K8, PreAlgebra (available in Spanish), Algebra I (available in Spanish) and II, Geometry, PreCalculus, AP
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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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 Comprehensive School Mathematics Program (CSMP)  Midcontinent Regional Educational Laboratory (McREL)
A K6 mathematics curriculum from the Midcontinent Regional Educational Laboratory (McREL) that focuses on problem solving, concept development, and other higher cognitive processes following the NCTM Standards. The program requires special preparation;
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 Comptometer  Biography of a Machine  Brooke W. Boering
A site on the early development of the business calculator around the turn of the twentieth century in America. Learn about the various models of comptometers, their features, and how to identify them; Dorr Eugene Felt, their inventor, and the company
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 The Concept and Teaching of PlaceValue  Rick Garlikov
A theoretical explanation about (the problem of) teaching PlaceValue to children, with a practical method given based on that explanation.
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 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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 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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 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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 Cool Math Dudes  ThinkQuest 1996
Problems to explore, with solutions: Investment Inquiry; Circle Selections; The Beginning of Breanna; Matrices Mayhem; Breanna Returns.... With a Watch; Roots of Algebra; Breanna's Chess Companions; Squares of All Shapes and Sizes (well, not of all shapes);
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 Cool Math Guy  Dana Mosely
Watch math lessons delivered by a video instructor for several textbook publishers. Topics range from arithmetic to several variable calculus, and include review for the standardized tests such as the SAT and ACT. Also, play games that involve matching,
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 Cool Math Lessons  Ken Abbott
A blog of "simple ways to teach and think about mathematics." Posts, which date back to April, 2010, have covered zero, prime decomposition, fractions, functions, and creating mathematics.
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 Corbettmaths  John Corbett
Hundreds of videos, "5aday" and other worksheets, practice papers, practice questions, revision cards, conundrums, quizzes, and more by a Somerset (U.K.) mathematics teacher.
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