 Earning 5.5 Percent Interest  NASA Lewis Learning Technologies Project
Mareta put $4,000.00 in a savings account at an annual interest rate of 5.5%. How much interest will the principal earn in 1 year? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Easier Fibonacci puzzles  Ron Knott
Puzzles that are simply related to the Fibonacci numbers....; Brick Wall patterns; Making a beeline with Fibonacci numbers; Chairs in a row; Stepping Stones; Fibonacci numbers for a change!; Telephone Trees ; Leonardo's Leaps; Fix or Flip; Two heads
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 EasyCalculation.com
Free online mathematics converter, calculators, and other tools for numbers, unit conversions, hexa conversions, decimal conversions, binary conversions, area, trigonometry, analytical geometry, algebra (e.g., group work, Bernoulli inequality, Venn diagrams
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 Easymaths  Echelon Systems Ltd.
A UK math site with GCSE tutorials, notes to be used as introductions to topics or for revision; an Exam Bank with examstyle questions and model answers for ages 1216; book reviews, a Practice Room with practice maths problems and tips for solving them;
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 ecalculus.org: The Calculus Page  Hass, Kouba, University of California, Davis, CA
Resources for calculus students: calculus problems with solutions; sample exams; excerpts from "How to Ace Calculus" (the Streetwise Guide); animations; tips on preparing for exams; mathematics and the job market (professions that use mathematics); and
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 ECC Tutorial  Certicom
Elliptic Curve Cryptosystem Classroom introduces elliptic curves and how they are used to create a secure and powerful cryptosystem: elliptic curve groups over real numbers, over Fp, over F2m, and the discrete log problem. Certicom's 109bit and other
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 Echecs & Math: Jeux, Exercices et Méthodes  Bernard Faujour
Java et JavaScript pour apprendre la géométrie des tangrams et des polyominoes. Les problèmes incluent questions de logique, et textes et tableaux. Les ressources incluent jeux pour télécharger, et une fabrique d'exercices
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 EdPlace Maths  EdPlace
EdPlace Maths is a is a registered Curriculum Online subscription website that offers over 2000 interactive and printable maths worksheets for KS1 through KS4. Free samples available; paid subscriptions allow users to generate new problems for each worksheet
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 Ed Tech Tools  University of Hawaii
Free, webbased tools for educators, featuring QuizMaker 2.0, which allows users to create and correct online quizzes easily and quickly, without any knowledge of HTML. It provides instant feedback to students, and/or package answers in an email that
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 Educational Interests  Keith Lynn
See, in particular, Lynn's Math Modeling Project, which features Java applets to produce quadratic and sine examples; and Dynamics Project, on the Julia and Mandelbrot sets.
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 Educational Videos and Software for K12  Allied Video Corporation
Educational videos, software, and Web page services. The math series includes The Assistant Professor math videos (Fractions and All Their Parts; All About Angles; What is Area?; What are Variables?; The Pythagorean Theorem; Which Way is Minus?; The World
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 EduGain  Ashish Kumar
Practice for CBSE, ICSE and math olympiads with this assessment infrastructure, which generates randomized questions of various types  objective, descriptive, fill in the blanks, matching, and more. Read daily "bytes" and other articles; register to
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 Edusolution.com  Levi Anthony
Edusolution.com's math center provides New York State Regents Math A, Math B, and Math Courses 1, 2, and 3 exams, with answer keys, dating back to 1999; as well as autoscoring online math quizzes, a discussion forum for teachers, and New York State standards.
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 Edutest: Online Assessment Resource
Assessment testing based on nationally recognized standards in Math and Language Arts for grades 28. Scoring is instant and both parents and teachers can review the tests and the correct answers with their students. The site has some information for
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 Edwards  Clayton Edwards
Problems, lessons, units, and "starters" by a middle grades math teacher who believes in differentiation and "using a mixture of traditional and reform methods to solidify understanding and engage mathematical minds": integer operations, order of operations,
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 Effortless Algebra  maranGraphics Inc.
Flip and skip through the 305 pages of Effortless Algebra online. Laid out with a "visual grammar," this book covers fractions, exponents, matrices, polynomials, and radicals; solving basic equations, quadratic equations and inequalities; graphing linear
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 Eggy's School
A math game for beginning addition: click on the chalk and find the answer to singledigit addition.
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 Egyptian Mathematics  Mark Millmore
A clearlywritten description of the Egyptian numerical system, with some practice problems from John Heaton and Pam B. Newberry to test your understanding. Java calculator adds, subtracts, multiplies, and divides in Egyptian numerals.
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 Eighth Grade (AAA Math)  John Banfill
Interactive math exercises, lessons, and games covering basic arithmetic concepts and methods, for eighth grade.
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 Einstein's Big Idea  WGBH Boston
Resources to accompany the PBS broadcast "Einstein's Big Idea," the theory of special relativity: program transcript; teacher's guide; inquiry and articles; and "Interactives, Audio and More," which includes video of ten top physicists each describing
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 Ejercicios Resueltos de Matematicas  GuiaMath
Ejercicios Resueltos de Matematicas, Atencion Personalizada Para Estudiantes de Ingenieria y Licenciaturas. Material En formatos Jpg y Videos Mpg, Tratamos todo tipo de Asignaturas de Algebra y Calculo desde Basico a Superior. Logica, Conjuntos, Funciones,
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 Ejercicios y Problemas de Matemática  Pablo Mateus
Ejercicios y problemas de números (natural, entero, racional, real), estadística, ecuaciones, funciones, análisis combinatorio, probabilidad, trigonometria, geometria, y más. También, um glosario y consejo sobre pruebas
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 Electronic Bookshelf (Mathematics Across the Curriculum)  Dartmouth College
Materials produced by the MATC project are listed on the Electronic Bookshelf. Topics include: Algebra; Calculus and Differential Equations; Engineering; Physical Sciences; Art; Computer Science; History and Geography; PreAlgebra; Biology, Medicine,
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 The Electronic Encyclopedia of Statistical Exercises and Examples
Supplementing introductory textbooks, the Electronic Encyclopedia of Statistical Exercises and Examples (EESEE) comprises over 80 "realworld" stories, or examples, about the uses and abuses of statistics and statistical inference, drawn from published
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 Electronic Games for Education in Math and Science (EGEMS)  British Columbia, Canada
Archives of a collaborative effort by scientists, educators, and professional video game and educational software developers to do research on and develop teaching materials that integrate video games and computerbased explorations with existing classroom
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 Elementary Computer Mathematics  Kenneth R. Koehler
An introduction to the mathematics used in the design of computer and network hardware and software. This hypertextbook's goal is to prepare the student for further coursework in such areas as hardware architecture, operating systems internals, application
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 Elementary Math Enrichment  Beth Schaubroeck
Free mathematics enrichment materials for accelerated 4th and 5th graders. The 70 lessons, grouped into 12 different units, include solutions and teacher guides: Ancient Mathematics (Mayan math, in base 20; and Egyptian math, which lacks zero), Baseball
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 Elementary Math Games  Elementary Math Games
Free educational math games and printable math worksheets.
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 Elementary Math Worksheet Generator  Eduvelop
A web based math generator that creates printer friendly worksheets and worksheets that can be completed online. From Eduvelop, a company that also produces courseware and testpreparation software.
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 Elementary Problem of the Week  Math Forum
A project designed to challenge elementary students with nonroutine problems and to encourage them to verbalize their solutions. From 1995 to 2002, solutions submitted from students for the Elementary Problem of the Week were answered by Visiting Math
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 Elevated Math  Elevated Lab Press
Instructional math videos, aligned to the Common Core State Standards (CCSS), enlivened with multiple voices as well as graphic and cartoon animation. This iPad app, which includes a whiteboard for working out math problems, comes with two lessons and
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 Eli's Math and Logic Puzzles and Other Interesting Things  Eli Karplus
A mixed bag of problems, some geared toward the 6th grade level, others to challenge college folk, with answers for a few. Three Men in a Hotel/The Missing Dollar; The Boatman Crossing the River with Fox, Chicken, and Cabbage; Benardete's Paradox; The
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 Ellipsis Math  Dr. Valerie J. Henry
A curriculum for basic math facts that "incorporates research on best practices from countries around the world as well as cognitive research on memory and retrieval." Sample algebra word "wall cards"; browse and subscribe to the Math Motivator newsletter;
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 El Paraíso de las Matemáticas  www.matematicas.net
Una página en castellano que pretende cubrir los múltiples aspectos de las Matemáticas, con apuntes, ejercicios, exámenes, enlaces, diccionario, etc. Orientada a la enseñanza media y superior. In Spanish: a page that
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 The Elverson Puzzle Co., Inc.
The creators of Jacob's Revenge, the classic wine bottle puzzle. Elverson Puzzle also makes a Tangram Puzzle, the eleven tiles of which form a 6 inch diameter circle; Farkle, a game played with extra large wooden dice or online, with the dice roller that
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 eMathHelp
View worked solutions to problems, or submit your own to WyzAnt.com tutors. See also eMathHelp's notes on prealgebra, algebra, calculus, differential equations, and more.
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 Emaths
Free resources for maths teachers, organized into courses such as "Investigations / Rich Tasks / Puzzles," schemes of work, grade boundaries for key stages 2 and 3 of the SATs (UK National Curriculum Tests), jokes and funnies, and more. "Very old exam
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 The EMPower Project  TERC
Extending Mathematical Power: A Math Curriculum for Adults, extends school mathematics reform to currently underserved populations so that they more effectively engage mathematical demands at work, at home as parents and caregivers, in the community,
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 The Endeavour  John D. Cook
Cook's blog posts, which date back to January, 2008, have included "A Ramanujan series for calculating pi," "Limerick primes," "Twin prime conjecture and the Pentium division bug," "Three surprises with the trapezoid rule," "Where to wait for an elevator,"
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 ENGAGE Engineering  Susan Staffin Metz, Principal Investigator
Free resources to retain engineering undergraduates, particularly underrepresented groups, by improving their daytoday classroom and educational experiences. Funded by a grant from the National Science Foundation (NSF), ENGAGE provides lesson plans,
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 Enigmalia. El país de los enigmas
In Spanish or Catalan: Web donde podrás resolver cada semana un nuevo problema matemático/lógico. Estos problemas versarán sobre los enigmalianos, habitantes de un país donde el motor que todo lo mueve es la curiosidad por los enigmas. La publicación
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 Enigmatum, Centre des Énigmes
In French: A tous ceux qui aiment se creuser la tête, de nombreuses énigmes classées
par thèmes: logique, mathématiques, paradoxes etc.. Toutes les énigmes sont
accompagnées de leurs solutions. Des plus petits au plus grands venez
travailler votre
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 Enlaces en español para la matemática / Spanish language math resources  Math Forum
Mathematics and math education resources available online in Spanish, collected by the Math Forum. Categories: Juegos de ingenio/Problems and Puzzles (Brainteasers, games, and competitions); Lecciones y actividades/Lessons and activities (Lesson plans
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 Equipalindromic Numbers  Len Smiley
A description of the expansion of square root of natural numbers into continued fractions, and the strings of palindromes that can emerge from them. With a table of the first 100 natural numbers and their equipalindromic quadratic polynomials.
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 Erich's Combinatorial Geometry Page  Erich Friedman
Famous and infamous problems with diagrams and some solutions and proofs. Includes: tree planting problems; circles through points; maximizing squares; triangulating squares; triangulating triangles; lines avoiding squares; lines avoiding points; points
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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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 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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 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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 Euclid: The Game  Kasper Peulen
Classic Euclidean constructions using GeoGebra JavaScript.
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