 How Students Learn: History, Math, and Science in the Classroom  M. Suzanne Donovan and John D. Bransford, National Academies Press
A volume that uses the latest research on cognition, teaching, and learning to address the practical questions that confront every classroom teacher. Leading educators explain in detail how they developed successful curricula and teaching approaches,
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 How Stuff Works
A site devoted to explaining the world in a way that is both informative and entertaining. Content is designed to be understandable for people of all ages and education levels.
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 How Things Work  Louis A. Bloomfield
An archive of answers to physics questions sent by readers. "Think of this site as a radio callin program that's being held on the WWW instead of the radio. If you ask how something works, using the button below, I'll try to provide an explanation. You'll
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 How to Become a Mathematics Teacher  Cait Etherington
Suggestions on how to become an elementary mathematics teacher, a middle school mathematics teacher, a high school mathematics teacher, a college mathematics professor, or a university mathematics professor. Resources for navigating the educational and
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 How To Code Information With Error Detection  University of Toronto Mathematics Network
A short essay and a description of "two out of five code," a special case of Hamming code.
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 How to Fix an Election  Ivars Peterson (MathTrek)
Voting sounds like a simple matter. Just pick a candidate, then count the ballots and announce the tally. When there are three or more candidates (or choices), however, the results may not actually reflect the true preferences of the voters.
Suppose
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 How to Knit a Moebius Band (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
Directions for using two colors to knit a band that can be cut apart into a Moebius strip, expanded by Maria IanoFletcher from an original recipe by Miles Reid.
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 How to Lace Like an Ace (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
One of your sneakers has a broken shoelace. You want to replace it, but the only laces you have around are much shorter. Is there a way to lace your shoes so that you can use the shorter laces? There are three common ways to lace shoes: American (or standard)
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 Howto Series  ERIC/AE; Bruce Thompson, Texas A&M Univ.
This is a set of online, fulltext books and booklets addressing practical evaluation, research, measurement, and statistical issues. The series started as a joint project of ERIC/AE and Bruce Thompson, Texas A&M University. We have since added other
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 How to Solve a Rubik's Cube Guide for Beginners  John Wade
An illustrated guide to solving Rubik's cube in seven steps.
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 How to use a Chinese Abacus: A ComputerBased Tutorial  Jan G. Hogle
An abacus helps make abstract math concepts more concrete. This site includes a softwarebased tutorial to illustrate the basic use of an abacus. The tutorial presents a brief introduction; and illustrates, with graphics, text, and animation, how to represent
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 HowTown.com  Lance Pettit
How to do practically everything in 10 steps or less. Submit your own HowTo, read others, or ask a question using the Web form provided.
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 How to Write Checks  Timothy Liptrap, Stocks, Bonds and More, Inc.
Purchase a 68page ebook with a complete system to help children learn how to write checks, balance a checkbook, and problem solve. Math skills are used in all calculations, when writing checks, when balancing checkbooks and in finding errors.
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 HubbleSite  Space Telescope Science Institute (STScI)
The home on the Web of the Hubble Space Telescope, a NASA Origins mission that seeks answers to fundamental questions about the universe and our place in it. Features include: Newscenter (search, by year or category, an indexed catalog of Hubble pictures,
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 The Huexotzinco Codex  Library of Congress
In this lesson, students analyze a set of pictograph documents created by native peoples of Puebla, Mexico in 1531. Then they take on the role of historians, studying the documents, decoding images, tabulating quantities of goods paid to the local government,
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 Hufnagel's Software  Hank Hufnagel
Math games that reinforce basic operations and symmetry: Mouse Math, SpiroMath, and SymmeToy.
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 Humanistic Mathematics  Mathematics Education at The Math Forum
The idea that teaching, learning, and creating mathematics issues from the same psyche as literature, aesthetics, and music has attracted, since 1986, a worldwide network of people who share this belief. The existence of the Humanistic Mathematics Network
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 Human Research Program Education and Outreach Project  NASA  Johnson Space Center
This project strives to reach diverse communities, inspire a new generation of scientists and engineers, and encourage future space explorers. Browse all of its programs through the site above. One of the project's areas of focus is to develop supplemental
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 Hummer's Mind Reader  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Java simulation of a magic trick invented in the 1950s by the magician Bob Hummer. Choose one of three coins. Swap the other two, then swap as many pairs as you like. When you're done, the computer will announce your selection. The explanation includes
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 HungHsi Wu's Home Page  HungHsi Wu
Articles on the Common Core Mathematics Standards (CCSS) and math education in general, such as "The impact of Common Core Standards on the mathematics education of teachers," "Bringing the Common Core State Mathematics Standards to Life" (published in
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 Hungry Frog Software  Science Education Software Inc. (SESI)
Educational software for Windows 95/NT and Apple Macintosh  Math, Chemistry 512, Latin/Greek HS & College, and languages, 412 (French, Spanish, Italian, German). All of the Hungry Frog games are based on the same fundamental game scenario: frogs
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 Hunting e  Ivars Peterson (MathTrek)
Lagging far behind in the celebrity sweepstakes is the number known as e. Carried to 20 decimal places, e is 2.71828 18284 59045 23536. Only 50,000,817 of its decimal digits have been computed so far  though there are unconfirmed reports that 1 billion
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 Hydroponics Project Page  Holtz, Cooper; Levering School, Philadelphia, PA
A project plan for a seventh grade class that involves growing different hydroponic gardens and measuring and graphing the results. Included on this site are: project summary reports, pictures of the kids and the gardens, results chart, movie, standards
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 Hypatia of Alexandria: Mathematician, Astronomer, and Philosopher  David Fideler; Alexandria on the World Wide Web
A brief biographical sketch, along with three source materials: The Life of Hypatia from The Suda; The Life of Hypatia by Socrates Scholasticus; and The Life of Hypatia by John, Bishop of Nikiu. (This Christian writer spoke with approval of the murder
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 Hyperbolic Geometry (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
A closed polyhedron cannot be made by snapping together seven equilateral triangles so that there are seven at every vertex, but if you persist and continue to snap together seven triangles at each vertex, you will actually construct an approximate model
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 The Hyperbolic Surface Activity Page  Dr. Tom Holroyd
This page contains a postscript file and directions for constructing
a hyperbolic plane tesselation using paper, scissors, and tape. It
demonstrates why hexagons tile flat space, but heptagons require
curved space (and helps to introduce nonEuclidean
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 HyperGami and JavaGami  Ann & Mike Eisenberg; Inst. of Cognitive Science, Univ. of Colorado, Boulder
HyperGami and JavaGami are software environments for designing and building paper sculpture. Choose from a number of starting polyhedra, which appear in a 3D window alongside a corresponding "folding net" in a 2D window. Employ both builtin features
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 Hypergami (Geometry Forum Summer Institute)  Michael Eisenberg, Ann Nishioka
A program for the creation of paper sculptures of various types  particularly polyhedral models and the larger, multipart sculptures that can be created from polyhedra. Description of a Geometry Forum Institute program (summer 1995).
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 Hypermedia Textbook for Grades 612 (MathMol)  NYU/ACF Scientific Visualization Laboratory
Designed for middle school students, but also useful for students of high school chemistry. Introductory concepts: mass, weight, volume, density, scientific notation, our 3dimensional world, VRML, geometry quiz, the geometry of 2 and 3 dimensions, and
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 IAEPedia  Information Age Education (IAE); The Science Factory
IAE, founded by Dave Moursund, is a nonprofit organization that provides free materials for preservice and inservice teachers. It focuses on improving education at all levels and throughout the world. The IAEPedia is a wiki page about its educational
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 Ian Stewart
News, books, and research by the science and science fiction writer and Emeritus Professor in the Mathematics Department at Warwick University, where he conducts research in nonlinear dynamics. "Goodies" include all 20 issues of the student mathematical
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 I Choose Math  Justin Lanier
Blog by a high school teacher in Brooklyn Heights. Posts, which date back to August, 2011, have included "SBG: Affective Quizzing," "FreeChoice Time: Origins," "Introducing Proof Using Formal Systems," and "Math is Personal: A smOOC about Meaning, Sharing,
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 ICME10 Denmark
The 10th International Congress on Mathematical Education will be held in Copenhagen, Denmark, July 411, 2004. The aim is to show what is happening in mathematics education worldwide, in terms of research as well as teaching practices; exchange information
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 IcoachMath
A platform for elementary and middle school math students to practice and improve their skills. The site has content for 300+ lessons in basic and advanced topics in math. Create worksheets with number, word problems and multiple choice questions; track
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 iCoachMath.com  HighPoints Learning, Inc.
iCoachMath.com coaches students online; and provides teachers with student performance reports, customized test papers, and math resources such as lesson plans aligned to state and national standards. The site freely offers an illustrated dictionary of
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 ICTMT  3: Technology in Mathematics Teaching  University of Koblenz
The Third International Conference on Technology in Mathematics Teaching. Abstracts and papers in English and German; workshops; posters. Sample subjects: Math with calculators in elementary schools; Using the TI 92 in an introductory number theory course;
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 Idea Math
Programs for students in grades 6 through 12 who want "to advance their problem solving skills, both to expand their mathematical horizons, and to maximize their performance in math competitions." Idea Math offers weekends classes (at Lexington High School,
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 Ideas, Concepts, and Definitions (MegaMath)  Nancy Casey; Los Alamos National Laboratory
A glossary and reference page to help students learn more about mathematics and find out what some of the special words mean. Topics: Doing What Mathematicians Do; Truth and Proof; Mathematical Objects and Their Properties; Modeling and Abstraction; Algorithms;
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 IDEAS: Interactive Dialogue with Educators from Across the State  TEACH Wisconsin Collaboration Committee, Univ. of Wisconsin
As a portal site, IDEAS provides a starting point for searching for educational materials. Although the resources have been aligned to the Wisconsin State Academic Standards, teachers in other states might find their organized list useful. Search lesson
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 Identical Calendars for 2000 (Math Chat)  Frank Morgan, MAA Online
For programming into the VCR on January 1st for correct day and date, what years in the 1900s have the same calendar as the year 2000? An identical calendar must, like 2000, be a leap year starting on a Saturday. Leap years occur every four years, and
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 Identification of Equivalent Fractions (SMILE)  Bette B. Jarrow, Gaudy School
A modified rummy card game designed to teach students the meaning of a fraction; to identify the fractional representation for "one whole"; and to recognize the renamed fraction after it has been increased or reduced. From the Arithmetic section of a
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 I ❤ Edu  Meagan Kelly
Blog by a 7th grade math teacher in Southern California providing educational technology and other resources to improve teaching practices and inspire student learning. Posts by this Google Certified Educator, AVID (DoDEA Advancement Via Individual Determination)
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 iFD Bundle  iFD Software Consult
Five mathematical products for Pocket PC and Windows in one software package: iFD Geometry, iFD Graph, iFD Calc, iFD Formula, and iFD unit converter. All products available separately as well, in addition to other software applications.
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 I Feel the Need for Speed  Jeff Amerson
A rollercoaster lesson. Students learn to calculate the speed, velocity, acceleration, and inertia of a moving object and distinguish between distance and displacement. They also calculate the acceleration rates of the nation's fastest roller coasters.
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 iFigure
Links to online calculators and worksheets that provide information to help in planning, solving and making decisions for problems and tasks such as buying a home, investing money, figuring business profits, making statistical comparisons, or calculating
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 If You Build It, Will They Come? Participant Involvement in Digital Libraries  Giersch, Klotz, McMartin, Muramatsu, Renninger, Shumar, and Weimar
A paper concerning a workshop involving representatives from several digital libraries with user participation. The workshop explored the ways users participate in digital libraries, and methods of studying these participants' interactions.
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 The Ignite Show  Georgia Public Broadcasting
TV shows and blog that "raise respect and awareness of educators and education through the voices of teachers, parents and students" in studentcentered classrooms. Half hourlong videos that feature math teachers include episodes starring 2008 California
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 iKodeko  iKodeko Software, Inc.
Free online math quizzes cover least common multiple (LCM), Roman numerals conversion, number to words, and algebra word problems. Review performance, and participate in discussions around individual test items. Download the iKodeko Worksheet Maker freeware
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 Illuminations  National Council of Teachers of Mathematics (NCTM)
Interactive resources for students and teachers based on NCTM's Principles and Standards for School Mathematics. The site is divided by grade band (PreK2, 35, 68, 912, and a crossband section). Each band contains the following topics: iMath Investigationsinteractive
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 The Illustrative Mathematics Project
Providing guidance to states, assessment consortia, testing companies, and curriculum developers by illustrating the range and types of mathematical work that students will experience with the Common Core State Standards, and by publishing other tools
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