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  1. Exact Confidence Interval for a Proportion - Michael P. McLaughlin
    Online calculator (with descriptive text) to compute a Bayesian credible interval for an observed proportion. ...more>>

  2. Exactly How Is Math Used In Technology? - Mathematics Dept., British Columbia Institute of Technology
    A table of examples of how various areas of mathematics are applied to various areas of technology. Areas of technology include biomedical engineering, food technology, building technology, chemical sciences, civil and structural engineering, graphics ...more>>

  3. Exambot - Exambot Educational Services
    A free database (requires registration) of math and physics questions with fully worked solutions; also an exam set generator that will produce customized practice exams to match the profile of any course. ...more>>

  4. Examination Papers - University of Cambridge
    Download PDF and PostScript files of Cambridge's mathematical tripos examination papers from the past decade. See also the exam papers from Natural Sciences Tripos (NST) and Part III (postgraduate). ...more>>

  5. Example Problems.com - Todd Smith
    This site is an open-community collection of math problems and full solutions for every area of math from Algebra through graduate level partial differential equations, optics, and special functions. The code used on the site's wiki is the same as TeX. ...more>>

  6. Examples of Essays - Jim Wilson; Dept. of Mathematics Education, Univ. of Georgia
    Extended Concurrencies of the Triangle, J. Wilson; Parabolas Inscribed in a Triangle, G. Giddings; Polygonal Spirals, L. Shook and M. Callinan; Roots 2 and 5, J. Wilson; Those Amazing Palindromes, Shareef Bacchus; Tangrams, Greg Huberty; Phi: That Golden ...more>>

  7. ExamSolutions
    ExamSolutions.co.uk is designed to help revision for maths A level. It contains questions, answers and worked solutions to past exam papers from Edexcel, OCR and AQA exam boards, all in PDF format. Some are free. ...more>>

  8. Excel Everywhere.com - Framtidsforum I&M AB
    Automatically converts a spreadsheet into a good-looking and calculating web page. It can be used to present mathematics on the web, and for creating self-correcting tests. Teachers can get free licenses for student projects, so that these can be presented ...more>>

  9. Excel Models Blog - Jess
    Blog about the use of Excel to analyze real-world problems mathematically. Posts, which date back to October, 2011, have included "Simple Excel Sales Dashboard," "Tutorial Using Concatenate Function In Excel," "Teacher Grade Book," "Buying House To Rent," ...more>>

  10. Excel's Solver and Premium Solver Platforms - Frontline Systems, Inc.
    A resource for users of spreadsheets, optimization, and other mathematical software. Solver.com's free support information for the standard Excel Solver is more extensive than Microsoft's own site for Excel. Includes a Solver Tutorial and a set of powerful, ...more>>

  11. Excel Tutorial - www.excel-easy.com
    Free, step-by-step tutorials on functions, data analysis, VBA, and more features of Microsoft's spreadsheet software. All primers include illustrative screenshots and sample download .xls files. ...more>>

  12. Exercices on Mathematics - Luis Breda
    Online math drills in English and Portuguese: lines, fractions, points and vectors, powers and radicals, first-degree equations, second-degree functions, trigonometry, circles, and derivatives. ...more>>

  13. 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 three-dimensional imagination as 'visualization', but that isn't exactly right. A visual image is a kind of picture, and it is really two-dimensional. The image you form in ...more>>

  14. Exercises in Math Readiness for University (EMR) - Dept. of Mathematics and Statistics, University of Saskatchewan
    A collection of exercises with solutions/tutorials for high school mathematics topics important for university study in mathematics, sciences, engineering and commerce. Exercises at three degrees of difficulty, covering graphing, solving inequalities, ...more>>

  15. Expanding Universe: a classified search tool for amateur astronomy - Daniels, Enright, Gliddon, & Sen-Roy
    A collection of sites organized using a modified Dewey Decimal Classification, to make searching the web more like browsing a library shelf. Includes an alphabetical terms list for searching and a request for more sites. ...more>>

  16. The Expected Number of Rising Sequences After a Shuffle [PDF] - Peter Doyle
    A paper taking up Brad Mann's derivation of his simple expression for the expected number of rising sequences in a deck after a shuffle, which involved lengthy gymnastics with binomial coefficients. Doyle provides a short derivation. A PostScript file ...more>>

  17. Experiencing Geometry in Euclidean, Spherical, and Hyperbolic Spaces - David W. Henderson; Cornell University
    A book that presents a series of problems. Most of the chapters start intuitively and are accessible to a general reader with no particular mathematics background; however, the discussions were written for mathematics majors and mathematics teachers and ...more>>

  18. Experimentation, Graphing, and Algebraic Derivation - R. H. Logan
    A scientific graphing lesson that details the derivation of the slope intercept formula; the slope-intercept formula in Chemistry; and linear relations in Chemistry and Physics. ...more>>

  19. Experiments with the 3n+1 Sequence - Alfred Wasserman
    An online program tests numbers for convergence under the 3n + 1 sequence. Also available in German. ...more>>

  20. ExperSim: Experimental Simulations - McClelland, Polson; University of Colorado
    Generate simulated experimental data for four studies - Imprinting in Precocial Birds (Rajecki), The Etiology of Schizophrenia (Main), Motivational Factors in Routine Performance (Mueller), and Social Facilitation (Rajecki & Halstead-Nussloch). For ...more>>

  21. Expert Choice
    Analytic Hierarchy Process (AHP) and other decision support software for strategic planning and operations research. ...more>>

  22. Expert Math Tutoring in New York - Expert Tutor NY
    Ivy League chemistry graduate and certified test prep course teacher offers private instruction for math at high school and college levels in metropolitan New York area -- Regents, SAT, SAT II, algebra, geometry, trigonometry, calculus, precalculus. ...more>>

  23. Explained Visually - Powell, Victor; and Lhe, Lewis
    Interactive JavaScript to "make hard ideas intuitive." Drag sliders and select values to simulate sine and cosine, exponentiation, Markov chains, conditional probability, and more. ...more>>

  24. Explaining Mathematics - Joel Feinstein
    Ideas and praxis by a lecturer at the University of Nottingham (UK). Feinstein's blog posts, which date to December, 2008, have included "How and why we do proofs" and "Problems using LaTeX seminar class with pdflatex" and "Feedback on the use of IT in ...more>>

  25. The Exploratorium
    Home page of San Francisco's museum of science, art and human perception. Online exhibits, cool sites, archives, sport and science, and the digital library (the Exploratorium A-to-Z). ...more>>

  26. Exploratorium's Science of Baseball - The Exploratorium
    Interactive (Shockwave) exhibits from San Francisco's science museum include Fastball Reaction Time (can you hit a 90-mph fastball?) and Scientific Slugger (see what makes a home run: vary the angle of the ball, bat speed, and pitch speed, then watch ...more>>

  27. Exploratorium's Science of Cycling - The Exploratorium
    Organized into seven sections. Introduction: What is the Science of Cycling? The wheel: Why do road bikes have thin tires, while mountain bikes have fat tires? Drives and gears: What is a gear ratio? And how do gears help make the bicycle so efficient? ...more>>

  28. Exploratorium's Science of Hockey - The Exploratorium
    This site takes you inside the game: you'll hear from National Hockey League players and coaches, as well as leading physicists and chemists. Divided into seven main sections: the ice (why is ice slippery?), skating (what are the mechanics involved in ...more>>

  29. Exploratorium's Skateboard Science - The Exploratorium
    Watch a webcast (RealPlayer) of professional skateboarders performing as an Exploratorium staff physicist explains the physics behind this extreme sport; also, an interview with a skateboard designer, and a Flatland Freestyle demo. "Trickscience" looks ...more>>

  30. ExploreLearning.com - ExploreLearning
    A library of virtual manipulatives called "Gizmos", primarily for grades 3-12, in math and science. Math topics include the major strands of instruction according to national standards, as well as developmental math, college algebra and college-level ...more>>

  31. Exploring Abstract Algebra with Mathematica - Kenneth M. Levasseur; Dept. of Mathematical Sciences, Univ. of Massachusetts at Lowell
    An assortment of functions illustrated in Visual Mode that are available in the AbstractAlgebra Packages. Identity; Inverses; AssociativeQ; AbelianQ; CayleyTable(s); OrderOfAllElements; Commutators; GroupExponent; Dihedral; Morphoids/PreservesQ; VisualizeMorphoid; ...more>>

  32. Exploring Advanced Euclidean Geometry with Geometer's Sketchpad - Gerard A. Venema
    A sequence of PDFs that show how to use dynamic visualization software to explore topics in collegiate Euclidean geometry. Each file is 0.2MB or smaller. The complete sequence runs 121 pages, and features a table of contents, bibliography, index, and ...more>>

  33. Exploring Chaos and Fractals - RMIT Publishing
    An electronic textbook on CD-ROM which covers the subject of chaos theory and fractal geometry and includes text, worksheets, sound, video, and animation. Course material is presented with multiple entry points and themes, and can be used within a single ...more>>

  34. Exploring Emergence - Resnick, Silverman; Epistemology and Learning Group, Massachusetts Institute of Technology (MIT)
    An active essay that uses Java applets to explore the idea of emergence, examining how objects and patterns can arise from simple interactions in ways that are surprising and counter-intuitive. Examples with simple squares that turn on and off and give ...more>>

  35. Exploring Hyperspace with the Geometric Product - Thomas S. Briggs
    This paper presents an area of higher-dimensional geometry to a general audience. It also highlights areas where new discoveries could be made. This exploration encounters double prisms, the double cylinder, prism cylinder, flat torus, spherical hypercylinder, ...more>>

  36. Exploring Precalculus - William Mueller
    A lively and intuitive introduction to precalculus. Materials center on three themes: functions, rates of change, and accumulation. Showing the subject from many angles, illustrations include algebraic, graph-based, and real-world examples, and feature ...more>>

  37. Exploring the Euler Gamma and Riemann Zeta Functions - Sjoerd J.Schaper
    A graphic Euler gamma and Riemann zeta explorer, built around the binomial version of Peter Borwein's "An Efficient Algorithm for the Riemann Zeta Function" (1995). The program plots function values on the real line, draws Argand diagrams of the mapping ...more>>

  38. Exploring the Space of Cellular Automata - Langton, Hayden, Gutowitz, Carr, Fraser
    Cellular automata (CA) are discrete space/time logical universes, obeying their own local physics according to given rules. Space in CA is partitioned into discrete volume elements called "cells" and time progresses in discrete steps. Each cell of space ...more>>

  39. Exploring Your Future in Math and Science - Andrew Frank-Loron, Jennifer Handrich, Chia-Chen Wu
    Encouraging Women in the Sciences: the Women and Science page of the WWW. As part of the final project for a Women's Studies course at the University of Wisconsin-Madison, students explored reasons why women are less likely to enter professions in math ...more>>

  40. Exponential Sketch - Finzer, Berkelman, Bennett; Key Curriculum Press
    A sketch that draws the exponential function and lets you change the base dynamically. ...more>>

  41. Expositions and Notes - Ben Green; Trinity College, Cambridge, UK
    DVI files on topics in sieve theory and combinatorial number theory. ...more>>

  42. Expository Papers from the Geometry Center
    Documents written at the Geometry Center that take advantage of hypertext to present information about mathematics or the Geometry Center in a style accessible to a wide audience. Engineering Education at the Geometry Center (Keynes, Wicklin); Outside ...more>>

  43. Expression Calculator - D. Block, Vestris, Inc.
    A calculator for Windows 95/98/NT that does 2D plots and financial functions, constants, operators, logical functions, dozens of common functions, primes and hyperbolic functions, students and Gauss integrals, Fresnel, elliptic integrals, trigonometric ...more>>

  44. Expressionism - Aleksey Onopriyenko, MathDonalds.com
    A WYSIWYG browser-based editor (MathML + JavaScript) of mathematical expressions which is also capable of rendering images (e.g. in PNG format). ...more>>

  45. EXTEND: Perspectives on Mathematics Education - Exxon Education Foundation
    EXTEND is a national Internet forum on mathematics education intended to involve new constituencies, engage new voices, and examine new perspectives. Major topics are explored through forum reports, position papers, and reader commentary. Issues include ...more>>

  46. Extracts from Thomas Hirst's diary - MacTutor Math History Archives
    Quotations from Thomas Hirst's journals concerning the following mathematicians: Bertrand, Boole, Brioschi, Cayley, Chasles, Chebyshev, Cremona, De Morgan, Dirichlet, Gauss, Kovalevskaya, Liouville, Maxwell, Poinsot, and Steiner. ...more>>

  47. Extreme Optimization: Numerical Linear Algebra Library for C# and VB.NET - Jeffrey Sax, Extreme Optimization
    Object-oriented classes for linear algebra and a broad range of numerical techniques for the Microsoft .NET framework. Topics covered: solving equations, mathematical curves, approximation, numerical integration and differentiation, complex numbers. ...more>>

  48. Extreme Optimization Statistics Library for .NET - Jeffrey Sax, ExoAnalytics Inc.
    The Extreme Optimization Statistics Library for .NET includes classes for over 20 probability distributions, random number generation, hypothesis tests, and a range of statistical models, including multiple linear regression and analysis of variance (ANOVA). ...more>>

  49. The Extreme Science and Engineering Discovery Environment
    Supercomputers, collections of data, new tools, and other integrated advanced digital resources and services for scientific research. See, in particular, the Education and Outreach Service of the Extreme Science and Engineering Discovery Environment (XSEDE), ...more>>

  50. Eye Opener Series - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
    A collection of Java applets that illustrate and thus help to solve or prove various math problems: Euclid's Proof of the Pythagorean Theorem; Construction problem; Disappearing Lines puzzle; Sam Loyd's fifteen; Sliders puzzle; Lucky 7 puzzle; Happy 8 ...more>>

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