 Eric Digest 104: Block Scheduling  Karen Irmsher
A 1996 article, with a bibliography: What's wrong with the traditional day? What is Block Scheduling? What are its advantages and challenges? What advice do experts have for making the change?
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 ERIC Digests  Educational Resources Information Center (ERIC)
Digests are short reports on topics of prime current interest in education, targeted specifically for teachers, administrators, policymakers, and other practitioners, but generally useful to the broad educational community. Each offers an overview of
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 Erich's Packing Center  Erich Friedman
A huge collection of packing problems, each explained with graphics. 2D examples include Triangles in Squares, Circles in Squares, Squares in Squares, Triangles in Triangles, Circles in Triangles, Squares in Triangles, Triangles in Circles, Circles in
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 Erich's Puzzle Palace  Erich Friedman
Mathematical puzzles, with solutions, in the following categories: mirror puzzles, number puzzles, hex loop puzzles, path puzzles, battleship puzzles, triangulation puzzles, grid puzzles, criscross puzzles, weight puzzles, and logic puzzles. In particular,
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 Eric Weisstein's World of Scientific Biography  Eric Weisstein. Wolfram Research
The World of Biography briefly outlines the discoveries and advances of over 250 mathematicians, and includes links to publications with more historical details about the individuals. Each notecardlike bio puts a face to the entries in MathWorld, Weisstein's
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 Escape Velocity Calculator  Brian Martin
This minimal javascript tool calculates the escape velocity of a body given the body's mass and radius (sample data are provided for the Earth, the Moon, Jupiter, and the Sun).
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 Escher Web Sketch  Wes Hardaker, Gervais Chapuis; Univ. of Lausanne, Switzerland
A Java applet that allows you to draw repeating patterns. With documentation on how to use the applet, a pattern archive, the authors' favorite patterns, a link to download Escher Web Sketch, the program's source code, and interesting crystallographic
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 ESCOT (Educational Software Components of Tomorrow) Problems of the Week  Math Forum
An interactive problem of the week service offered from 1999 until 2001. ESCOT is an NSFfunded research grant that developed interactive Java applets to help middle school learners understand typically difficult math concepts, for example, fractions
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 Esri
Developers of geographic information systems (GIS). Math education books include GIS Tutorial, Fun with Global Positioning Systems (GPS), and the series Our World, which features software, lessons, data, and assessments. ESRI's ArcLessons library freely
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 Essays on Constructivism and Education  Tom O'Haver; Maryland Collaborative for Teacher Preparation
An extensive collection of articles on constructivist teaching strategies, change in education, technology in the classroom, hypertext and cognitive flexibility, constructivist pedagogy readings, and more.
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 The Essence Of Algebra  Jim Loy
Simple explanations of variables and equations for the beginning student of algebra.
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 Esso Family Math Project  Barry Onslow, Judi Waters, Nancy Chapple, Linda Adams, et al.
A communitybased program for families that uses everyday materials and math games to help children understand math ideas. Concepts used in the real world  such as measurement, estimation, and mental math  are sometimes difficult for
children to
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 Estimation 180  Andrew Stadel
A new estimation challenge every day of the school year, with accompanying video answers. Join the number sense challenge online by submitting your own estimates, explaining your reasoning ("What context clues did you use?") and rating your accuracy ("How
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 Estimation Contest (SMILE)  Sandra A. KingBryson, Saucedo Magnet School
A lesson that uses breakfast cereal to give students a concrete understanding of the subtle difference between a guess and an estimate. From the Practical and Applied Math section of a collection of almost 200 single concept lessons by the Science and
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 e Teaching Assistance Program  eTAP, Inc.
Lesson plans, examples and exercises, review checks, and other instructional materials, including audio downloads, on the language of mathematics; basic operations; order of operations and combining terms; fractions; multiplying and dividing fractions;
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 Ethnography at the Math Forum [PDF file]  Wesley Shumar
A discussion of the author's research on teacher communities, networking, and professional development online through the Math Forum, and techniques used to study them.
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 Ethnomathematics Digital Library  Pacific Resources for Education and Learning
A resource network and interactive learning community for ethnomathematics, with emphasis on the indigenous mathematics of the Pacific region. Search this resource network's links to relevant websites worldwide; or browse it according to geographic area,
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 Ethnomathematics  Nancy Casey
Ethnomathematics is the study of mathematics which takes into consideration the culture in which mathematics arises. Mathematics is often associated with the study of "universals"; however, it is important to recognize that often something we think of
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 e to the i pi  Kevin Bertman
Investigations for teachers to use in mathematics classes. Posts include Phantom Traffic Jams (velocities); Hypotrochoids (Spirographs); Cartograms; Rogue Waves; Fractal Trees; Stereoscopic Images; Six Degrees of Separation; Shoelaces (applying the Pythagorean
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 The Euclidean Algorithm  David Sumner
Find the greatest common divisor (GCD) online using the Euclidean Algorithm. Enter two numbers, and the JavaScript calculates GCD, least common multiple (LCM), and linear combination; and displays the steps of the algorithm.
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 Euclide  Patrick Iglesias; Ecole Normale Supérieure de Lyon
Euclide est un logiciel d'apprentissage de géométrie plane pour
Macintosh destiné au collégiens et lycéens, pour aider à comprendre quelques théorèmes de géométrie plane, à
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 The Euclid Project  Dr. Robert E. Mason IV, The Dalton School
Description of a math program that uses visualization, analysis, informal deduction, and formal deduction to engage students in the study of geometry in an integrated manner. For example, a 7th Grade Geometer's Assignment on circles uses the Geometer's
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 EucliDraw  Kostas Pamfilos, George Nikoloudakis, and Paris Pamfilos
A program to draw plane Euclidean geometry figures. Features include an extensible toolbox, animations, Euclidean and arbitrary transformations, a catalogue of trianglecentertools, SchemeSockets to combine and generate complicated schemes and fractals,
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 Euclid's Algorithm  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
An explanation of Euclid's algorithm for finding the greatest common divisor (gcd) of any pair of numbers, and a relation to the fundamental theorem of arithmetic, with links to related pages on Euclid's Game, binary Euclid's Algorithm, more on the gcd
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 Euclid's Muse  Saltire Software
Hundreds of free interactive math apps created by users of Geometry Expressions, a constraintbased and symbolic geometry software package developed in part with grants from the National Science Foundation (NSF).
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 Eugenia Cheng
Research as well as "things for nonspecialists" by a mathematician "keen to bring mathematics to a wider audience and help reduce maths phobia." Articles by the author of HigherDimensional Categories: An Illustrated Guide Book and Cakes, Custard and
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 The Euler Archive
The Euler Archive is an online resource for Leonhard Euler's original works and modern Euler scholarship. The searchable database provides access to his original publications, references to available translations, and current research. Also available
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 The Euler Characteristic of an Orbifold (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
Suppose we have a symmetric pattern in the plane. We can make a symmetric map by subdividing the quotient orbifold into polygons, and then 'unrolling it' or 'unfolding it' to get a map in the plane...
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 The Euler Line of a Triangle  David Joyce; Dept. of Mathematics & Computer Science, Clark University
A draggable geometry applet illustrating the centroid, circumcircle and circumcenter, and altitudes and orthocenter of a triangle, and the straight line they all lie on, the Euler line.
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 EurekAlert! Science Reporting for Kids  American Association for the Advancement of Science (AAAS)
A central, online source for kidfriendly news and resources. This Portal for kids is housed within EurekAlert!, the editorially independent, online news service operated by AAAS, the science society. The Portal is available to reporters and editors who
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 The Euro  European Central Bank
On January 1, 2002, euro banknotes and coins were put into circulation. This site has sections for: euro banknotes and coins, getting ready for the euro, information for organizations, a children's zone, background to the euro, and news and events.
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 Evaluation Rubrics for Websites  Loogootee Elementary West, Loogootee, Indiana
Separate rubrics for primary, intermediate, and secondary grades, for children to use in evaluating sites, with a list of links to Webevaluating resources primarily for adults, steps to follow when creating Web pages, tips for announcing pages, and activities
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 Evalwave.com  Ryan Ingram
Search or browse these lists of the first ten billion prime numbers and the factors of the first one hundred million numbers.
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 The Event Inventor  Kye Ewing
Science, math, and technology explorations with no experience necessary. (Explorations can often be done by older children with no help.) Make your own quadrant and cross staff and explore the world around you  measuring heights of buildings or trees
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 Everyday Mathematics: A Parent's Handbook K5  Oswego School District
Classroom routines, standards by grade level, examples, glossary, and other resources. Learn about number families, number stories, games such as factor captor, and algorithms such as addition by partialsums, subtraction by countingup, lefttoright,
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 Everything Is Mathematical  RBA Contenidos Editoriales y Audiovisuales S.A.
Based on the series of books, published weekly in association with The Times and presented by Marcus du Sautoy, which aims to demonstrate clearly how mathematics shapes the world around us. Blog posts, which date back to September, 2012, have included
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 Everything you always wanted to know about Maths (but were afraid to ask)  Liz Richards
A site designed to give students an understanding of the history and purpose of maths and some of the major figures in the world of Mathematics
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 Everywhere, Butterflies
A gallery of fractal pictures created using Sterling, a shareware program by Stephen Ferguson.
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 Evil Mad Science  Evil Mad Science LLC
Producers of doityourself (DIY) and opensource hardware designs in support of art, education, and accessibility. See, in particular, the d20 and d12 Handbags of Holding Kits (zippered bags in the shape of dodecahedra and icosahedra) and the kit for
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 Evolution of Arabic (Roman) Numerals from India  B. B. Vishnu
A description of the development of our number signs, from India throughout the rest of the world, with highlights of how mathematics was helped and hindered by concepts of numbers. From Mathematics and the Spiritual Dimension.
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 The Evolution of the Real Numbers  Lawrence Spector
An introduction to real numbers, including such topics as: the ratio of natural numbers; continuous versus discrete; fractions; unit fractions; rational numbers; measurement: geometry and arithmetic; common measure; squares and their sides; incommensurable
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 ExamHelp  Anamika Sinha
Log in to generate math worksheets to print out or solve online with autoscoring, and to participate in web contests. ExamHelp has also blogged since October, 2010.
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 Examining How Mathematics is Used in the Workplace  Annie and John Selden; Mathematical Association of America
Abstracts of studies on how much mathematics is used in various occupations: Mathematics in Automobile Production; Proportional Reasoning by Nurses; Modeling the Mathematics of Banking; Mathematical Models as Seen by Biologists; How do Scientists Interpret
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 Excel Everywhere.com  Framtidsforum I&M AB
Automatically converts a spreadsheet into a goodlooking and calculating web page. It can be used to present mathematics on the web, and for creating selfcorrecting tests. Teachers can get free licenses for student projects, so that these can be presented
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 ExcelGrade eLearning
Online tutoring in math, science, and English, using a proprietary headset and whiteboard. Details, including testimonials and pricing, on the web.
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 The Excellent Adventure  Shawsheen Valley Technical High School, Billerica, MA
A mathbased crosscurricular site where students take a trip from Philadelphia down the East coast to Disney World, with several required stops and activities along the way. A teacher's guide, worksheets, and activities are provided: students figure
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 Excel Math  Brad Baker, Janice Raymond, et al.
A curriculum that presents math in a spiraling fashion for kindergarten through sixth grade students. Features include selfcorrection through Excel Math's CheckAnswer system, which allows students to check their own work. Download a sample packet or
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 Exclusive Educational Products  Exclusive Educational Products
Order math resources and manipulatives for the curriculum of Ontario, Canada, as listed by grade or by the strands of number sense, measurement, patterning and algebra, geometry, data management, and assessment. Virtual workshops include samples from
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 Exemplars
Exemplars is meant to assist teachers, schools and districts implement authentic assessment and problem solving in their classrooms and to meet the challenging new standards developed in mathematics, science and humanities at the national, state and local
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 Exercises in Imagination (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
How do you imagine geometric figures in your head? Most people talk about their threedimensional imagination as 'visualization', but that isn't exactly right. A visual image is a kind of picture, and it is really twodimensional. The image you form in
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