 Math  Wonderopolis®
Each Wonder of the Day® includes several paragraphs' overview (Did you know?), modeling suggestions (Try it out!), a vocabulary list (Wonder Words), and other information to stimulate children's curiosity. Share your wonderments, questions, and answers
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 Measurements In The Metric System (SMILE)  Christine Fair, Farragut Career Academy
A 3rd grade lesson designed to teach students to estimate and then measure to the nearest inch and centimeter. From the Geometry and Measurement section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for
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 Measuring Up, Prototypes for Mathematics Assessment  National Academy of Sciences
An electronic version of Measuring Up, a book on assessing students in accordance with the NCTM math standards by the National Research Council that provides examples of problems students should be able to solve at a fourth grade level and insights on
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 Moneybee Multiplayer PreAlgebra  Jordan Pollack
Interactive peer tutoring site where pairs of learners create "coin puzzles" for each other to solve. Requires free registration, as this is an educational psychology research project.
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 Numeracy Games  James Barrett
Flash games in number facts (including funky mummy and brilliant beadstring), counting (funny fingers and duck shoot), bridging through 10 (techno tortoise and +/ number lines), time (hickory dickory and fairy clock), shape and measures (shifting shapes),
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 Numeracy Hour Activities  Ambleside Primary School on the Web
Games designed by or with children, and interactive teaching programs to download. Games and activities include Amblegraph (create simple bar charts online); Online Calculator; Analogue Clock (a time teaching tool); Table Trees (multiplication tables);
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 Online Math Applications  Leung, Jiang, Jiang, Chiu, Klopfer, Chiu; ThinkQuest Junior
Activities, examples, problems, and online quizzes about math applied to real world situations in investing (a stock market simulation game), music (classical MIDI files), history (biographies and anecdotes), science (astronomy, computers, 'math in the
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 Place Value  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How do I provide my students with practice on their place value skills?
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 PlaneMath  InfoUse, in cooperation with NASA
Materials for elementary school students about math and aeronautics, designed to stimulate and motivate students with physical disabilities in grades 47 to pursue aeronauticsrelated careers via the development and delivery of accessible math education
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 The Professor in a Syllabus: Elementary Algebra  Vision Alpha Products
Selfinstructional elementary algebra and arithmetic. Learn at your own pace from dozens of brief, animated, independent, selfteaching modules. Watch videos of TPIAS in action for distance learning, and its demo, before subscribing. Also available at
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 Quia!  The Learning Group
Create your own Javaenabled quizzes, home pages, and learning games to play over the Internet: enter your material into a form, select a few options, and press a button. Games have been created and are available for browsing in mathematics, as well as:
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 Quiz Me  D. Kell and Mercer County Community College
Interactive quizzes constructed using software provided by Addison Wesley Longman Publishers. Autoscoring, multiple choice selftests on whole numbers (place value, operations, applications, rounding, roots and order of operations); fractions (equivalencies,
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 Real World Math  Thomas J. Petra
Lessons that use Google Earth to teach math include Oil Spill Estimates and Scientific Notations; Iditarod Challenge and Typhoon Project; Four Color Map and Mazes & Labyrinths; Crop Circles and Fractal Measurement; Lunar Sports and Rockets. Each lesson
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 Resource Room (Math Central)  University of Regina, Regina, Saskatchewan, Canada
French version: Centre de ressources. A service of Math Central that allows mathematics educators to share resources having to do with math teaching. Submissions are stored in a database that can be browsed by educational level and curriculum strand,
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 Rich Maths Tasks to Engage  East Midlands Maths Network
These teachermade rich maths tasks in number, algebra, shape, and data handling emerged from a collaborative project run by Jon Stratford, Lead Practitioner for the Specialist Schools and Academies Trust (SSAT): arrangements, clock face, chocolate dilemma,
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 Rockin' the Standards
Musical recordings by a rock band led by a veteran elementary school teacher who takes the lyrics from common tunes and changes them to help kids remember what they've been taught in school. Each of the fourteen songs on the album "Rockin' the Standards
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 Rounding Down?  Jim Loy
This is an article about the difference between rounding and truncation, with some stories about the effects of rounding (or truncation) on computer programs.
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 Rounding Numbers  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about rounding whole numbers. decimals, and fractions.
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 Rounding Numbers  Math Forum, Ask Dr. Math FAQ
How do you round a number to the nearest tenth (10th), hundredth (100th), thousandth (1000th), etc.?
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 SlideARound Math Manipulatives  Jim Franklin
These manipulatives feature movable, interchangeable slides for learning how to round whole numbers, decimals, and money; to identify equivalent fractions; to calculate elapsed time, and more. Manufactured in the U.S. of recycled plastic with steel reinforcement,
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 SliderMath Equations  WhiteAcres Media
Windows software designed to introduce linear equations and basic algebra, bringing together many of the requirements of the grades 710 math curriculum or providing a review of fundamentals for adults. Levels 12 include addition, subtraction, multiplication,
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 Stupid Calculations  Josh Orter
Repository "where practical facts get rendered into utterly useless ones." Posts, which date back to May, 2013, have included "Monophone," musing on the size of the screen made from ripping the displays out of every iPhone ever sold and combining them
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 Teaching Pets  Andy Davis
See the math resources section of this collection of worksheets and related resources for the primary and middle grades teachers.
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 WisWeb  Freudenthal Institute
The Freudenthal Institute, a Dutch organization for secondary education, provides applets to support/extend the math instruction of students 12 years and older. For this site, WisWeb recommends versions 5 or higher of Internet Explorer, Netscape or Opera.
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 Worksheet Factory  Worksheet Factory
Free math worksheets and flash cards that can be generated and printed from home.
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 World Population and Four Dice (Math Chat)  Frank Morgan; Christian Science Monitor
Answers to the old challenge (Estimate what fraction of the people who have ever lived on Earth are alive on Earth today.) plus a new challenge and an additional problem and answer (courtesy S. H. Logue: Ann learned that her old dotmatrix printer can
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