 Infinity  MacTutor Math History Archives
Linked essay on the mathematical, philosophical, and religious aspects of infinity. With references and other related web sites.
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 Infinity: You Can't Get There From Here!  B. Sidney Smith; Math Academy Online/Platonic Realms
A "minitext" offering a concise introduction to the concept of infinity. Includes historical background, Cantor's set theory, and an introductory discussion of cardinality, as well as suggested reading.
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 The Inflation Calculator  S. Morgan Friedman
A web form that adjusts any given amount of money for inflation, according to the Consumer Price Index, from 1800 to 2005. Pre1975 data are the Consumer Price Index statistics from Historical Statistics of the United States (USGPO, 1975). All data since
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 InfoMath
Online K12 math, following the premise that learning mathematics the traditional way is more effective than by playing games. Webbased courses: Math Tutor, PreAlgebra Tutor, Algebra Tutor, PreCalculus.
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 Infonation  United Nations Publications
An easytouse, twostep database that allows you to view and compare the most uptodate statistical data for the Member States of the United Nations. In the first menu, you can select up to seven countries; then proceed to the data menu where to select
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 infoplease.com: OnLine Dictionary, Encyclopedia, & Almanac Resource  Information Please
An encyclopedia, dictionary, and a browseable and searchable collection of almanacs in categories: world; sports; entertainment; US; people; business; living; society; science & technology; and many subcategories. Of interest for math is a table showing
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 Information Access Laboratory  Directorate for Education and Human Resources, National Science Foundatation
The Information Access Laboratory is dedicated to encouraging students with disabilities in the sciences by eliminating barriers that hinder their educational pursuits. Students with disabilities are especially underrepresented in the science, engineering,
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 Information on Pentomino Puzzles  Frank Ruskey; Dept. of Computer Science, Univ. of Victoria, B.C., Canada
A pentomino is an arrangement of 5 unit squares (or sometimes cubes) that are joined along their edges. Up to isomorphism (rotating and flipping), there are 12 possible shapes, which are illustrated. Each piece is labelled by the letter that most accurately
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 Information Technology Experiences for Students and Teachers (ITEST)  Education Development Center, Inc.
The ITEST program funds projects that provide opportunities for both schoolage children and teachers to build the skills and knowledge needed to advance their study and to function and contribute in a technologically rich society. The ITEST program also
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 InfoWeb's Teachers Gateway  North Carolina Department of Public Instruction (DPI)
New and important information for teachers; educational research  links to studies, papers and reports about how children learn, effective teaching, etc.; instructional resources on and off the Web; education news; law and policy; award programs; education
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 InnerTube Games
Designers of arcade quality educational game apps that espouse embodied learning from which "you cannot fail to learn about mathematics." Use puzzlesolving skills to explore and practice basic arithmetic, integer partitions — even Diophantine equations
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 Innovate  James L. Morrison, EditorinChief
A peerreviewed bimonthly ejournal on research and practice of the use of information technology to enhance education. Innovate invites users to "... do more than simply read. Use our onebutton features to comment on articles, share material with colleagues
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 Innovative Teaching: Math Edition  Walter McKenzie, Creative Classroom Consulting
Math edition of a newsletter recommending links useful to teachers. From November, 1998.
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 in pursuit of nerdiness
Blog by a middle grades and high school math teacher, formerly in the South Bronx, currently in the Netherlands teaching both within the Dutch national curriculum (in English) and within the International Baccalaureate Middle Years & Diploma Programs.
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 InquiCalc  Donovan Harshbarger
Use InquiCalc's 90 builtin functions to graph up to eight different plots on a single plane, customizing colors and other display parameters along the way. Save output in .BMP, .GIF, .JPG, or .PNG formats; or copy graphs from this graphing calculator
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 inQuiry Almanack  Franklin Institute
A magazine about inquirybased learning. Regular features, a surprise spotlight of the month, favorite sites, the latest in science news, what's new at The Franklin Institute, experiments, and a puzzle. Archives are online beginning in March, 1995.
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 Inquiry maths  Blair, Andrew; and Martin, Caitriona
Inquiry prompts for topics related to number, algebra, and shape to use in secondary school mathematics. Accompanying notes support teachers who "want to make their lessons more open and, thereby, encourage student independence and leadership."
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 Inside Mathematics
Classroom examples of innovative math teaching methods, insights into student learning, and instructional tools ready for immediate use. Adopt a schoolwide problemsolving theme with Inside Mathematics' Problems of the Month, each featuring video overviews,
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 The Insight Method of Teaching Math  Robert Frick
How and why to teach math via mental models, as articulated by a cognitive psychologist who describes the "learning is memory" approach as "a disaster and a tragedy." See, in particular, Frick's sample problems: reverse arithmetic, expressing patterns,
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 InSITE: The Information Network of SITE  Society for Information Technology and Teacher Education
A clearinghouse for textbased and multimedia materials related to the integration of technology into teacher education, including staff development, exploring how educators from various content areas and at various locations can collaborate over the
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 Inspirational Mathematics for Interactive Whiteboards  PowerpointMaths.com
A large collection of Powerpoint resources for the mathematics classroom, for use with electronic whiteboards, in the categories: algebra, data handling, enrichment, measures, mental maths 5000, number, and shape and space.
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 InstaCalc Online Calculator  Kalid Azad
InstaCalc is a fast, shareable and free online calculator. You can compute answers quickly and share a link to any result. Instructions and examples available on the site.
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 InstaGraphs: Adhesive Grid and Graph Papers  Calvin Leung, Clear Educational Solutions
Adhesive pads preprinted with various graphs and grids. Super economical and more educationally sound than standard graph paper. Good for relation graphing, trigs functions, graphing calculator windows, fraction arithmetic, multiplication tables...
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 Instant Math Series  France & Associates
A set of productivity tools for teachers and parents that will prepare tests or worksheets, as well as the answer keys. Useful for practice homework drills for parents who want to help their children learn math. Macintosh only. Demo available to download.
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 The Institute for Figuring  Margaret and Christine Wertheim, CoDirectors
"If mathematics is a language of pattern, its structures may be seen as the verses of a formal, yet fantastical poetics. Across the globe people have delighted in the harmonies of this language and the patterns discovered therein. These are the songs
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 Institute for Learning  University of Pittsburgh
Researchbased curriculum, tools, and professional development designed to build the capacity of teachers, administrators, and systems to provide students with high quality instruction and learning opportunities. See especially What We Know, Principles
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 Institute for Mathematics and Education  The Arizona Board of Regents
The Institute for Mathematics and Education (IM&E) supports local, national, and international projects in mathematics education that "focus on both the mathematics and the students, can be applied to current needs, build on existing knowledge, and are
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 Institute for Special Education  University of Fribourg/Switzerland
A variety of research projects in English, German, and French, including Training of cognitive strategies  a computer programme for learningdisabled children; Publications (quarterly journal, books in German).
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 Institute for the Transfer of Technology to Education (ITTE)  National School Boards Association
A program of the National School Boards Association designed to help advance the wise use of technology in public education. ITTE provides information, publications, and meeting opportunities to school and districtlevel educators who are considering
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 Institute of Consumer Financial Education  Paul Richard
Money tips and information on finances, savings, investment, and firsttime credit for young Americans, their parents, and grandparents. Articles include "18 Ways to Teach Children or Grandchildren the Value of Money," "10 Commandments of Personal Finance
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 The Institute of Technology Center for Educational Programs (ITCEP)  Regents of the University of Minnesota
ITCEP develops and administers educational programs in mathematics and its related science and engineering applications for precollege, undergraduate and graduate students, and for K12 preservice/inservice teachers. For children, ITCEP administers the
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 Instituto Nacional de Estadística e Informática (INEI)  Perú
El Instituto coordina las actividades estadísticas e informáticas oficiales del Perú. Notas de Prensa; Capacitación (Escuela Nacional de Estadística e Informática y Capacitación a Distancia con cursos para el Censo);
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 Institut Pengembangan Pendidikan Matematika Realistik Indonesia
Indonesian implementation and dissemination of Pendidikan Matematika Realistik Indonesia (PMRI), the Dutchinspired Realistic Mathematics Education (RME). Blog posts  a few in English, most in Indonesian  date back to August, 2009.
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 Instructional Architect  Utah State University
The Instructional Architect software helps teachers make web pages that incorporate existing instructional resources from the National Science Digital Library and the web in general. See examples of projects created using Instructional Architect. Requires
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 Instructional Fair Group  TS Denison
The 2000 catalogue of over 4000 products. Select mathematics to search by keyword or find product groupings under: algebra; base ten; basic operations; calculus; fractions; games & game pieces; geometry; mathematics kit; measurement; numbers &
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 Instructional Resources  Microsoft Corporation
Microsoft's instructional resources are divided into lesson plans (math), howto articles, and tutorials. You may search each section's resources by age group, Microsoft product, theme or learning area. See also the Design Gallery Live.
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 Integer Jim's Math Squad  Jim Bennett
Creative ways to use art, writing, research, and Internet projects to make math more exciting for students. The Math Squad art projects are yearlong projects; rather than "lesson oriented," they create an "adventure theme" that facilitates math instruction.
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 Integers, Rational/Irrational Numbers  Math Forum, Ask Dr. Math FAQ
What is an integer? Are fractions rational numbers? What about .9999...? How about decimals? pi? the Golden Ratio?
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 The IntegerZone  Philip Dorrell
A Java applet which presents the integers as a scrollable rectangular grid of cells, each cell displaying one number. Different modes illustrate different mathematical topics by defining the user's interaction with the grid in terms of response to mouse
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 Integrating Productivity Tools in Primary and Secondary Education  James L. Morrison; Horizon
Articles, some still in draft form, describing how teachers have integrated technology into their instruction.
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 Intelligent Tutor Math Educational Software, Inc.
The programs in the Intelligent Tutor software series contain tutorials designed to help students learn and master Grades 712 math subjects. The programs are designed with school versions for use in schools, and home versions for individuals in selfstudy
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 Intel Schools of Distinction  Intel Corporation
Every year, Intel honors U.S. schools that demonstrate 21st century teaching and learning environments that promote excellence in math and science with the Intel Schools of Distinction awards. To be considered, schools must develop an environment and
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 Interactions  Center for Media Education
Linked profiles of people and research projects investigating the way new technologies affect child development, and searching for technology that affects development in a positive manner. Links are divided into four categories: Create, Learn, Play,
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 Interactivate: Assessments  Shodor Education Foundation, Inc.
A set of Shodor's Interactivate activities that allow the user to keep track of correct responses. To use these activities as "assessments" just select the "Keep Score" button on the Java applet page. A number of these activities, the Connect Four type
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 Interactive Algebra  Robert Bunge
Java applets that allow you to practice your equations, factoring, and graphing skills, with multiple levels in each category. The applet generates random problems, which you work on paper, and you can check your answers when you're ready. Hints are also
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 Interactive Excel Spreadsheets  Scott A. Sinex, Prince George's Community College
"Excelets are interactive Excel spreadsheets or simulations of mathematical models. The user changes a variable and the spreadsheet changes in numerical, graphical, and/or even symbolic form (equations).... with no use of programming, no macros or Visual
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 Interactive Games  Cathleen J. Chamberlain and Mark Cogan, Oswego City School District
Design matching games and quizzes. Premade games include Ghost Blasters and Sum Sense, for practicing arithmetic; Banana Hunt, for estimating angle measures; Bang on Time, Class Clock, and Stop the Clock; Billy Bug, for learning coordinates; Fraction
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 Interactive Geometry Classroom Resources  CIGS, Math Forum
Links to downloads and classroom resources for dynamic geometry programs: the Geometer's Sketchpad; Cabri Geometry; Cinderellas Café (Java geometry software  German); Dr Geo (multilingual software for IBM PC); Euklid (Windows shareware in German
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 Interactive Geometry with JavaSketchPad  Bryan Dye; MathsNet
Java applets illustrate geometrical figures (circle, cuboid, equilateral, isosceles, and scalene triangles, kite, parallelogram, regular hexagon, octagon, pentagon, quadrilateral, square, rectangle, rhombus, trapezium); show what is meant by congruence,
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 Interactive Learning (Learning and Mathematics)  Brown, et al.; Math Forum
In a chapter entitled "Interactive learning and individual understanding: The case of reading and mathematics" in the 1991 book, Culture, schooling, and psychological development,  Brown, Campione, Reeve, Ferrara & Palincsar discuss learning in which
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