 Simulations & Demos  Rice Virtual Lab in Statistics
An integrated set of simulations, demonstrations, and case studies from the Data Analysis Lab (choose statistical analyses: Descriptive; Histogram; Boxplot; Stem and Leaf; ttests; Correlation and regression; ANOVA). Simulations include Java applets that
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 SISA: Simple Interactive Statistical Analysis  Daan Uitenbroek
SISA is a collection of procedures for performing simple statistical calculations online, using HTML Forms. SISA's statistical tools include statistical procedures: (sequential probability, ratios, ttest, Fisher exact, two by two table, ordinal tests,
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 Skillswise  BBC Online
Factsheets, worksheets, quizzes, and Flash games on whole numbers; measures, shape and space; fractions, decimals and percentages; and handling data. Resources for tutors include lesson plans, printable tracking sheets, a newsletter, and an expert column
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 Skimming A Century of Calculus  Cut the Knot!, Alexander Bogomolny
A comprehensive effort is under way to modernize instruction in undergraduate mathematics. In the November issue of the FOCUS newsletter, MAA has announced a twoyear $900,000 grant from the NSF to construct the Mathematical Sciences Digital Library (MATHDL).
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 Sliders  Cut the Knot!, Alexander Bogomolny, with Don Greenwell
A variation of the Fifteen puzzle invented by Sam Loyd in the early 1870's: puzzles on graphs, including a proof independent of Wilson's theorem that all Lucky 7 permutations are possible; and variations of Sliders, a Fifteenlike puzzle that can be played
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 Smartkiddies Mathematics  Andy Hobeika
Free interactive lessons, number challenge exercises, worksheets  and visual reporting for instant feedback. To begin, select a year (one through seven, corresponding to Australia's curriculum), then a module, ranging from whole number to position &
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 Smartkiddies Mathematics  Smartkiddies Mathematics
Video lessons, interactive activities, maths games, number challenge drills, worksheets, assessments. Developed by experienced Australian teachersall content is based on the Australian curriculum. Free to all schools and teachers during school hours;
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 SmartZoid
SmartZoid provides online math evaluation and tutoring with a comprehensive free assessment for grades K9.
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 Smith's Stuff: Resources  Mark Smith
Mark Smith shares resources that he has created as a high school teacher: games, mnemonics, activities, sketches, and more. Sign up for a free account if you'd like to share activities here as well.
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 Snap Math  John and Eva McKendrick; Teilhard
A version of the children's game, but to win the cards, you have to do the math. Click on the pack at the left to start; when your card matches the computer's card, you are set a series of math problems. If you answer correctly, you win the cards.
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 Snow Day Calculator  David Sukhin
Enter a ZIP code and number of school days already canceled there due to inclement weather, and the Snow Day Calculator predicts the probability of an early dismissal or no school the following day. Sukhin originally developed his predictive calculator
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 Snowdays  Popular Front
Make your own snowflakes online: point and click to cut anywhere around or inside the folded piece of virtual paper. Preview the unfolded results in real time; when ready, save your design to the searchable gallery, where you may view and download plans
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 Softmath  Neven Jurkovic
Developers of Algebrator, an automated tutor based on Maxima CAS that provides stepbystep solutions to algebra, trigonometry, and statistics problems, and exports answers to MathML. Demo and purchase Algebrator; use Softmath's free online software to
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 SoftSchools.com  Mani Gudavalli
Free math worksheets and interactive online games for practicing times tables, adding, subtracting, telling time, and more. Organized into prek, kindergarten, grades 12, grades 34, grade 5, measurement, and fun games.
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 Software and Animations (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of pointers to specialized software, Java applets, video sequences, and other forms of interactive or animated geometry.
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 Software  Bill White
These Flash apps provide online practice deriving some unknown property of a figure given its other measures. Find the area of a trapezoid given its two base lengths and height; find one of its bases given its area and height; find its height given its
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 Software by Al Jarnow  ProtoZone Interactives
Webbased interactive software excerpted from pattern exhibits at the Long
Island Children's Museum, the National Museum of Science and Industry (London),
and the Brooklyn Childrens's Museum. Introductions to art and math with many patternmaking
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 Solve for n  NASA Lewis Learning Technologies Project
Solve for n: 3/n = 7/12. A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Solve for y  NASA Lewis Learning Technologies Project
Solve the following for y: 12y  16 = 20y. A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Solve My Math  Solvemymath
Online math integrals calculator, derivative calculator, function grapher, math formulas and facts, math quizzes and puzzles.
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 Solve This!  ThinkQuest 2003
Information about eight famous mathematicians, with interactive quizzes, static problems and games.
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 Solving Quadratic Equations  Prakash Sukhu
Introduces the general form of the quadratic equation, and shows how to solve the quadratic equation step by step. Includes methods of factorisation and completing the square, questions to test your knowledge, and an online equation solver with which
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 Some Variations on the Theme of Polyominos  Recmath
Patterns that illustrate how the squares of polyominos are connected to each other. Examples of polyominos with a grid superimposed to illustrate the individual squares; with a line that joins the midpoint of two adjacent square if the squares are connected.
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 So Much Data  William D. May
Based on the book So Much Data, So Little Math, tools for learning to do simple data analysis on data sets. Features the online calculation tools "Easy Correlation Calculations" and "Easy Trend Prediction," with explanations, as well as an example of
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 Soroban in Various Number Systems  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A Java simulation of Sorobanthe Japanese analogue of the traditional abacus and the Chinese Suan Pan. This is the most economical tool of the three.
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 Source Panel Integrals / Java Matrix Solver  Marc Gerritsma, Jamie Grier
The source panel integrals Javascript can be used to calculate the integrals and the matrix elements of the source panel method (see sec 3.17 of Fundamentals of Aerodynamics, 2nd edition, by J.D. Anderson, jr.). The Java matrix solver can be used to solve
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 SpaceTime  Chris and Stephen DeSalvo
SpaceTime develops mathematics software for personal digital assistants (PDAs) and other mobile devices such as Pocket PCs, Palm Pilots, and smartphones. Play JavaScript and Flash games in the arcade: ArithmeTick, Math Scramble, Math Mountain, Snake,
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 Spatialised Prisoner's Dilemma: Evolution Simulator  Wayne Davis
Spatialised version of the Iterated Prisoner's Dilemma game theory that allows the users to set their own strategies and simulate evolution of strategies: Coded in Javascript by Wayne Davis.
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 Special Functions in WolframAlpha  Michael Trott
Special functions describe a large number of phenomena in mathematical physics and other disciplines. Michael Trott posts here about WolframAlpha's treatment of these functions. In particular, there are some with two forms: a simpler version that makes
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 Speed Math Trainer  Jimmy Ruska
Flashbased, very tiny file size, speed math program including a Google video tutorial. Watching the video tutorial is highly recommended as the program can be tricky to use. Free for redistribution and potentially useful for anyone wishing to increase
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 Spherical Geometry Demo  John M Sullivan, University of Illinois
An applet demonstrating several features of spherical geometry, among them the parallel transport of tangent vectors, and the fact that the angles of triangles may not sum to 180 degrees.
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 SPIMSOW: Swarthmore Summer Project for the Implementation of Mathematical Software on the Web  Bouttenot, Parlikar; Mathematics & Statistics Dept., Swarthmore College & Math Forum
The product of a 1998 summer project investigating current Weboriented mathematical software. The site explores the capabilities of the new Web versions of Mathematica, Maple, and MathView, offering tutorials on configuring the software and creating
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 Spirograph  Anu Garg
A Spirograph is formed by rolling a circle inside or outside of another circle. The pen is placed at any point on the rolling circle. This applet has changeable colors as well.
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 Spreading Memes  Cut the Knot!, Alexander Bogomolny
First of a series of interactive columns for MAA Online that use Java applets to simulate a puzzle or mathematical problem, one not stated directly since the applets are intended to be such that the right answer to an as yet unstated problem should be
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 Spy Guys: Online Elementary Mathematics Resource  Mathematics 6  LearnAlberta.ca
This Flash 5 site includes lessons (Decimals; Improper Fractions and Mixed Numbers; Ratio; Percent; Solving Problems with Decimals; Understanding Integers; Factors, Multiples, and Prime Factorization; Summarizing and Extending Patterns; Rounding Numbers;
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 Square Root Calculator  Chris Misenheimer
This interactive square root calculator calculates the square root of positive, negative, imaginary, and complex numbers, rounded to seven decimal places. Short articles include "Square roots and area," "Square roots without a calculator," and "What does
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 Star Fractal  Pierre Dufilie IV
A Java Applet displaying the Mandelbrot fractal set using exponential color smoothing. The program allows the user to zoom in and out of the fractal in the complex plane.
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 Starship Maths  BBC Learning
Six different interactive games, with accompanying resources for teachers and parents, designed for students ages 57: Place the Penguins  Cross the Swamp  Calamity's Quest  Park the Pods  Alien Cookbook  Number Jumbler. Print and Do, Teachers, Parents.
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 StatApplet  Marcus Kazmierczak
A simple statistics program and a short outline of the underlying mathematics. The statistics applet calculates the sample mean and sample standard deviation, and constructs a 95 percent confidence interval for data values entered.
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 StatiBot: Your expert system for inferential statistics  Dominik Heeb
An interactive tool for data analysis. Enter your data by hand or copy them from another program, then answer a series of questions. StatiBot will perform appropriate statistical tests, comment on test results, and create graphs. Site includes example
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 Statiscope  Mikael Bonnier
Statiscope presents summarizing data and descriptive statistical charts. In the applet you can enter data manually or download data over the Internet. Charts included: Distribution, Probability mass, Density, Box plot, Stem & leaf; also other features
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 Statistical Thinking for Managerial Decision Making  Prof. Hossein Arsham; University of Baltimore
Course description: Statistical summary measures, probability, random variables and their distributions: estimation and hypothesis testing, correlation and regression analysis, ANOVA, and their applications to business problems will be presented, and
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 Statistics101: Resampling  John Grosberg
Software for statistics and probability, it can be used to teach concepts via simulation. It can also be used for real bootstrap, Monte Carlo and simulation applications. Runs on any platform supporting Java 1.4.2 or better.
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 Statistics Norway
The agency that collects Norwegian statistics. Includes articles about data, tables of recent economic and population statistics, and list of publications; many publications and research papers may be read or downloaded in PDF format. The site also
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 Statistics Online Computational Resources (SOCR)  Ivo Dinov
Interactive Java applets for undergraduate and graduate students learning about variation, modeling, visualization and data interpretation. The most prominent are an applet used to explore different distributions, and a collection of different probabilityrelated
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 Statistics Resources  Econometrics  Forecasting  Resa Corporation
Concepts, formulas, and online software of descriptive statistics, continuous distributions, econometrics, and time series analysis (forecasting). Descriptive statistics covered include central tendency, concentration; box plots; density trace; moments;
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 Statistics To Use  Thomas W. Kirkman; College of Saint Benedict and Saint John's University
A tutorial on: Mean, Standard Deviation; Student's tTests; chisquare distribution test; contingency tables; Fisher Exact Test; ANOVA: ANalysis Of VAriance between groups; Ordinary Least Squares; Ordinary Least Squares with Plot option; Beyond Ordinary
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 Statistics: Unlocking the Power of Data  Lock, Robin; Lock, Patti Frazer; Morgan, Kari Lock; Lock, Eric F.; and Lock, Dennis F.
Companion materials for the Wiley textbook Statistics: Unlocking the Power of Data. See in particular StatKey, JavaScript for descriptive statistics and graphs, bootstrap confidence intervals, randomization hypothesis tests, sampling distributions, and
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 Statistics with Java  Mehmet Hakan Satman
Statistical applets for clustering, integrals, normal distribution, ordinary least squares, least median of squares regression, analysis of variance, bootstrapping, simplex solving, active ball regressors, random walk and white noise processes, and "Monkey
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 Stat Trek
Free, online tutorial covers basic statistics, probability, distributions, sampling, estimation, and hypothesis testing. Includes online calculators, sample problems with solutions, and glossary of statistical terms.
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