 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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 Images and Mathematics (Mathematics Archives)  University of Tennessee, Knoxville (UTK)
A large collection of images based on or related to mathematical principles, many purely mathematical abstractions, such as fractals; others of natural objects whose shape is explained by equations and mathematical models (for example, a drum vibrating).
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 Images of Mathematicians on Postage Stamps  Jeff Miller, Gulf High School, New Port Richey, FL
An alphabetical list of mathematicians whose images appear on postage stamps (Abel, Archimedes, Cauchy, Descartes, Euler, Galois, Gauss, Kovalevskaya, Laplace, Leibniz, Newton, Pascal, Poincaré, Ramanujan, and more), with countries, dates of issuance,
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 Imaginary Numbers  Math Forum, Ask Dr. Math FAQ
What is an imaginary number? What is i?
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 Imagine the Universe  HighEnergy Astrophysics Learning Center
A site, primarily but not exclusively for ages 14 and up, dedicated to a discussion about our universe: what we know about it, how it is evolving, the kinds of objects and phenomena it contains, how scientists know what they know, what mysteries remain,
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 Imagiware
A commercial site that including several games. A Java triangle puzzle; Web Puzzler lets you unscramble an image; MasterWeb is like the board game MasterMind; "Nowwwhere" is a Webaccessible virtual world; and there is a version of Mancala, too.
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 iMath
A free mathenhanced Web browser/editor supported by a net service to enable
the sending, receiving, storing, publishing, and discussion of pages with
math notation.
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 IMATH  Cathleen V. Sanders
A professional development course for teachers designed to help them integrate technology and the NCTM Standards into their teaching. Although this course is only available for credit to Hawaii teachers, teachers from other states may participate in the
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 iMath Learning  Active Maths, Inc.
Mathematical activities for kids aged 7 to 16. For individuals, small groups or with the whole class using a projector or interactive smartboard.
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 The Impact of the Math Forum's Problem(s) of the Week on Students' Mathematical Thinking  K. Ann Renninger, Laura Farra, and Claire FeldmanRiordan
Article in PDF format. Presented at the International Conference of the Learning Sciences 2000.
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 Implementing Curriculum, Instruction and Assessment Standards in Mathematics (NCREL)  Cathy Cook; Pathways to School Improvement
From Critical issues in mathematics. National educational standards are being developed in nearly all subject areas. The National Council of Teachers of Mathematics has recently developed standards for mathematics; its Curriculum and Evaluation Standards
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 Impossible Constructions  Math Forum, Ask Dr. Math FAQ
Problems from antiquity: trisecting an angle, squaring the circle, duplicating (or doubling) the cube.
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 Improving Measurement and Geometry in Elementary Schools (IMAGES)  Research for Better Schools (RBS)
Information and resources designed to help teachers develop a deeper understanding of geometry and measurement concepts and to assist in designing meaningful instruction for elementary students. Topics addressed include: cognitive and developmental issues;
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 IMPS  Education Development Center, Inc.
Illustrations that model implementation of the Common Core State Standards (CCSS) for Mathematical Practice (MPs) and connect them to the content standards. Centered on student dialogues, each of EDC's eight Implementing the Mathematical Practice Standards
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 Inclusion in Mathematics Education for Students with Disabilities
Presents facilitative strategies for math education for students with disabilities, especially AD/HD and learning disabilities. Most grade levels are appropriate for strategy applications.
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 Indian Math Online  Indian Math Online, LLC
A webbased learning system developed with principles of mathematics as practiced throughout the Indian education system, including starting early, testing frequently, practicing continuously, building steadily, and involving parents actively. IMO first
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 Individual Differences and the United States Education System  Douglas Trelfa
An overview of ability grouping and tracking in the United States, from The Educational System in the United States: Case Study Findings, March 1999. A discussion of the diversity of beliefs found regarding the question of how to deal effectively and
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 Industry Initiatives for Science and Math Education
Industry Initiatives for Science and Math Education (IISME) seeks to transform teaching and learning through industryeducation partnerships, such as its summer fellowship program. Founded in 1985 by a consortium of San Francisco Bay Area companies in
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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 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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 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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 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 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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 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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 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 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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 InstructorWeb: Teaching Tools, Lesson Plans, Worksheets  Instructor WEB and Money Instructor
Lesson plans, worksheets, interactive lessons. Download or make your own worksheets. For teaching and learning basic skills including telling time, basic math, calendars, classifying, counting, recognition, money, reading, writing, and more skills. Limited
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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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 Integrating Mathematics and Methods  Beal, Klespis; Math Forum
An integrated mathematics content and methods course taught at St. Xavier University for preservice elementary school teachers. Integration is accomplished by presenting the material in a problemsolving format in a laboratory context, with students working
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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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 Integrating the Internet  Susan Hixson
Primary resources, projects, a weekly newsletter, units of study, and "Internet in the Classroom," a tutorial to help in planning projects and class homepages. Includes links to an annotated list of primary resources for mathematics, and a page of links
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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 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 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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