 Graphing with Excel  LabWrite Project Team
Tutorial modules for visualizing data in Excel: data input into cells, creating a scatter plot and line graph, bar graphs and histograms, importing text files, final formatting, regression lines, superimposing graphs, descriptive statistics, and selecting
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 GraphPouch  Edcodia LLC
This iPad app lets you create graphing worksheets, use familiar PEMDAS operators to construct graphs, graph multiple equations per graph, reorganize them with draganddrop, "smart snap" to align objects, and more. Also available directly from the iTunes
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 GraphVisualizer  Terje Tysse
An applet that graphs simple functions, listed on the help page, over various user specified ranges.
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 GraspMath  Summit Interactive
Interactive CD and Video Courses to purchase: Elementary Math, Algebra, Geometry, High School Exit Exam Prep, Trigonometry, Calculus, TI Calculators and more. Stand alone math courses with assessments and guides; remedial math program supplements; tutorials
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 Grazing Animals  Math Forum, a Classic Problem from the Ask Dr. Math FAQ
A cow/goat/donkey is tethered to a barn in or a fence around a field... how long should the rope be so that she can eat half the grass?
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 Great Circle Mapper  Karl L. Swartz
Enter two locations on Earth (latitude and longitude, or airport codes) and see a map depicting the great circle path between them and a computation of the distance along that path. The Great Circle Mapper also displays the area within a given range of
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 The Greater Philadelphia Secondary Mathematics Project  The Greater Philadelphia Secondary Mathematics Project
A support site for the systemic implementation of professional development using nationally validated, exemplary, standardsbased secondary mathematics curricula in the Greater Philadelphia region. News and resources include edited dialogues about the
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 Greater Than, Less Than Symbols  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about "greater than" (>) and "less than" (<) symbols, such as memory aids for telling the difference between the two.
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 The Greatest Mathematicians of All Time  James Dow Allen
Rankings and capsule mathematical biographies of the 100 greatest mathematicians of all time, with discussion that covers great mathematicians' own selfappraisals; prizes and medals; omissions; proposed candidates; comparisons with other "top 100" lists
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 Great Math Programs  Xah Lee
A listing about 40 excellent recreational math programs for Macintosh that do: polyhedra and Rubic cubes, curves and surfaces, fractals and Lsystems, tilings and symmetry, game of hex and game of life, chess and fiveinarow, peg solitare and polyominos,
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 Great Maths Teaching Ideas  Will Emeny
Emeny's blog of teaching ideas and resources, which dates back to June, 2010, has included posts such as "Investigating the sum of interior angles in polygons," "Can you make practising the times tables fun? Yes, just give me three dice," "When angles
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 The Great Paper Airplane Challenge (TEAMS)  Jeannie Toshima; TEAMS Distance Learning, Los Angeles County Office of Education
Use origami to build the farthest flying airplane, and win the challenge. TEAMS looked for the farthest flying airplanes throughout the nation  the best
from each class. Students sent in the written directions (diagrams were acceptable) for folding
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 Greek Astronomy  MacTutor Math History Archives
Linked essay tracing the history of Greek astronomy from its beginnings with
Thales, in philosophy and timekeeping, through Pythagoras, Eratosthenes,
Hipparchus, Ptolemy, Plato, Aristotle, Aristarchus, and many others; with
references to relevant
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 Greek Mathematics and its Modern Heirs  SunSITE's Vatican Exhibit; Library of Congress
Classical roots of the scientific revolution. An essay on the history of Greek Math, with sample math problems. Covers Euclid's Elements and Optics, Archimedes' Works, Piero della Francesca's De quinque corporibus regularibus, and links to Ptolemy's Geography
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 Greek number systems  MacTutor Math History Archives
Linked essay on the history of the Greek number systems, notably the acrophonic system used in the first millennium BC, and the alphabetical numerals. With references and other related web sites.
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 Green Globs & Graphing Equations  Sharon Dugdale and David Kibbey
The original algebra and graphing software by Sharon Dugdale and David Kibbey, newly revised and updated by the authors to run on all versions of Mac OS X. Single user, multiuser, school, district, and other licenses available for a bundle that includes
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 The Greenwood Institute  Greenwood School
A dyslexia, learning disabilities, and literacy resource site, with links to Web resources and publications. Comprehensive training of literacy instructors for mainstream and specialized schools; support for home schooling; research support; and consulting
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 The Grey Labyrinth  Kevin Lin
A collection of mindbenders in math and logic. When a solution to one puzzle is posted, another solutionless puzzle is added. With an archive of past puzzles, links to other puzzlerelated sites, and a bibliography of works that inspired this site.
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 The Grid Game  Doug Ensley, Shippensburg University
A twoplayer game where the players alternate marking squares in a grid until there are none left. The first player chooses any single row or column and marks as many squares (at least one) as desired. The second player (the computer in this case) responds
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 Grid Puzzle  Rick Reed
A magic square Java applet that presents a 4x4 grid with mixedup numbers in it: drag individual numbers or flip, move, or swap rows and columns to make diagonals, rows, and columns add to 34.
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 Gridzzly.com  Rostislav Blaha
Make your own grid paper: select from among square, diamond, and hexagonal dots or lines, customizing spacing with the slider bar.
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 Grouping and Tracking Students in Math Classes  Mathematics Education at The Math Forum
The Math Forum's page of collected Web resources on the pros and cons of heterogeneous math grouping or ability tracking.
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 Grouping: Articles and Research  Carolyn K., Hoagies' Gifted Education Page
Articles and reports on grouping practices, primarily as related to the education of gifted children.
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 Grouping Practices (NCREL)  Pathways to School Improvement
"Grouping practices  especially tracking  often have the effect of reducing equity." This article explores the negative effects of tracking and touches on cooperative learning. From the North Central Regional Educational Laboratory (NCREL).
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 Guaranteach  Alasdair Trotter and George Tattersfield
Thousands of very short video lessons, recorded by dozens of different professional teachers whose methods and styles of teaching math vary widely. The diverse perspectives and "bitesize" chunks in Guaranteach's video library let viewers stay focused
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 Guidelines for Educational Uses of Networks  Learning Resource Server (LRS), College of Education, Univ. of Illinois at UrbanaChampaign
A starting set of papers with guidelines for how to use networks in powerful ways for education. Topics include telecommunication, virtual communities, global literacy, acceptable use policies, and neworkbased learning environments.
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 GVU Center  Jarek Rossignac; Georgia Tech
The Graphics, Visualization & Usability Center, envisioning a world in which computers are used as easily and effectively as are automobiles, stereos, and telephones, and collaborating on research projects in Visualization, Animation, VR, Design,
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 Hales Proves Hexagonal Honeycomb Conjecture (Math Chat)  Frank Morgan, MAA Online
Professor Thomas Hales of the University of Michigan has proven the Hexagonal Honeycomb Conjecture, which says that regular hexagons provide the leastperimeter way to enclose infinitely many unit areas in the plane. This may partly explain why hexagons
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 Hamilton's Math to Build On  Johnny & Margaret Hamilton
Simple, straightforward explanations, drawings, questions and answers from the book Math to Build On by Johnny & Margaret Hamilton (copyright 1993). Excerpts offer pages on: Angles, Degrees, Variables & Constants; Squaring Numbers; Square Roots;
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 Handheld Geometry  Nevil Hopley
A dynamic geometry site offering lessons and challenges for handheld devices and graphing calculators, including the Cabri™ Jr. Application for the Texas Instruments TI83+ and TI84+, and the TINspire™. The author offers to make users' contributions
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 Hand Made Manipulative Instructions  Margo Lynn Mankus
Pattern block cutouts: triangles, squares, smaller and larger rhombuses, trapezoids, and hexagons. Baseten blocks in sets of ones, tens, and hundreds; and basefive blocks in sets of ones, fives, and twentyfives. XYblock sets of X, X2, XY, Y, and Y2
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 Hands Across America (TEAMS)  Jeannie Toshima; TEAMS Distance Learning, Los Angeles County Office of Education
How far can we get across the United States if we all join hands and measure the length of the line? In 199495 7,164 participants yielded a total of 19,546.22 feet. Your students might want to put the information into a database, creating fields to compare
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 Hands on Banking  Wells Fargo Bank NA
Selfpaced financial literacy lessons on budgeting, savings and checking, credit, investing, and more. Kids learn with space aliens Zing and Zoey; teens, with characters Angie and Alex; young adults, with live action age cohorts. This initiative of Wells
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 Handson Computer Activities For Teaching Math: Grades 38  Beverly Burnley
Purchase or request an evaluation copy (if you're an educator) of this book. Publisher's description: "Featuring more than 100 stepbystep activities that use common computer programs, such as Microsoft Word and Paint, to model concepts in five basic
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 HandsOn Equations  Henry Borenson
A visual and kinesthetic teaching system for introducing algebraic concepts to students in grades 38. Students physically represent and solve algebraic linear equations using game pieces consisting of pawns and numbered cubes. For families homeschooling,
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 handsonmath.com  Charles Gronberg
Handson geometry model building materials to purchase, tested and test marketed by the American Association for the Advancement of Science in the late 1990s with the intention of targeting atrisk middleschool students (minorities and girls). The
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 Handson Science Centers Worldwide  Mark W. Maimone
An extensive list of links to public museums with a strong emphasis on interactive science education, by continent: Africa, Asia, Australia, Europe, and North and South America, with other related links. Some reviews of North American museums are provided.
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 The Hand Squeeze: A Data Collection and Analysis Class Experiment  Cynthia Lanius
An experiment: measuring the amount of time that it takes for a hand squeeze to pass around a circle. Record, graph, and analyze the data, and make predictions about the time it would take for more people/greater distances.
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 Hard Questions About Practice  Richard F. Elmore
"Educators need to look closely at the organizational and instructional practices that affect the learning of students and adults in schools." From Educational Leadership, May 2002, Vol 59 No 8, pp 2225.
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 Harnessing Technology to Serve Adult Literacy: Math  David J. Rosen
Frequently Asked Questions on how to help adult literacy education (ABE/GED/ESL/ESOL) teachers and learners use computers, television, audio and video cassettes, and other electronic technology to solve learning and instructional problems: "Our students
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 Harold Reiter's Home Page  Harold Reiter, Department of Mathematics, University of North Carolina at Charlotte
Freely downloadable puzzles and problems from the founder of teachers circles and math clubs in Charlotte and Mecklenburg, longtime writer of MathCOUNTS questions, and member of the ETS/College Board CLEP (CollegeLevel Examination Program) Precalculus
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 Harry Bohan's Web Site
Site contains personal info (education, jobs, list of publications), hyperstudio stacks of K8 math programs (some available for download here, all available by sending the required number of HD disks to Harry Bohan), an extensive page on teaching multiplication,
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 A Head for Numbers  Robert Kunzig, Discover Magazine
An article exploring the connections between our brains and numbers: what injuries to the brain have taught us about people's ability to calculate.
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 Hebrew Letters / Consonants  Amerisoft Inc.
A Hebrew letter and number chart from the At Home With Hebrew computer tutorial.
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 HegartyMaths  Colin Hegarty
Hundreds of narrated screencasts covering the UK's Key Stage 3, GCSE and ALevel curriculums, along with many past paper solution walkthroughs. Instructional videos — most for students; some for teachers — also available from the HegartyMaths
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 Helping with Homework  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How can I help my child with math homework?
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 HelpingWithMath.com  David Burns, HelpingWithMath.com
Worksheets, printable tables and charts, and online tools. Browse by subject or grade.
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 H.E.L.P. Program  Digital Directions International Inc.
Teaching math to English Language Learners (ELL), and Spanishspeaking students in particular, this internetbased, supplementary curriculum removes language barriers from the learning of math skills and math content via interactive lessons. Learn about
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 Help With Fractions  Uriel "Skip" Akers
Provides stepbystep instructions for adding, subtracting , multiplying and dividing fractions. Includes a fraction calculator.
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 A Hen and a Half  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about the rate of eggs laid by chickens: "If a chicken and a half lays an egg and a half in a day and a half ..."
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