 Sundry Algebraic Geometry and Commutative Algebra Sites  B. Harbourne
A list of links to personal home pages of mathematicians working in algebraic geometry.
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 Suntex First in Math  Suntex International Inc.
Play sample games of 24 online for free, or purchase a site subscription and register for access to a full range of interactive 24 games. Learn more about First in Math classroom kits, school kits, and the McDonald's restaurants First in Math League.
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 Super Bowls and Stock Markets  Ivars Peterson (MathTrek)
The Super Bowl "theory" links U.S. stock market performance to the results of the championship football game held each January since 1967. It holds that if a team from the original National Football League wins the title, the stock market
increases
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 SuperKids Educational Software Review  Knowledge Share LLC
Reviews of educational software in many categories, including math (see Math Software For Young Students and Math Software II). Reviews are comprehensive, including information about price and product support as well as general usability issues. A Math
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 SuperKids Math Worksheet Creator  SuperKids Educational Software Review
Make your own math drill worksheets: select the type of problem (addition, subtractions, multiplication, division, fractions, greater/less than), the maximum and minimum numbers to be used in the problems, click on the button, and a worksheet will be
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 SuperKids Review of Educational Algebra Software  Knowledge Share LLC
Reviews of the educational algebra programs: Astro Algebra, Grade Builder Algebra 1, Math Blaster Algebra, and Mathpert Algebra Assistant. Ratings based on educational value, kid appeal, ease of use, hardware requirements, and a buyer's guide (price comparison).
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 Superliminal  Daniel Green
Use the Tyler applet to create polygons of various sizes and attach them to edges of other polygons. Read about deltahedra, flexible polyhedra, and infinite polyhedra  figures made of an infinite number of polygons which would then fill all of space
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 Supermarket Math  Keith Devlin (Devlin's Angle)
Is it really possible to acquire skills  mathematical or otherwise  in a decontextualized fashion in a classroom setting, then make use of those skills in any reallife situation that may require them? The assumption that this is indeed possible is
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 Super Maths World  P. and R. May
Topicbased multiple choice assessment with a videogame feel. Yearlong subscriptions available for schools/districts, with a reduced rate for small schools and individual customers. Some activities are free to guests.
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 The Superstring Theory  Paul Hoiland
A site that gives a broad background from a mathematical point of view on general relativity, quantum mechanics, supersymmetry, and string theory. It also contains the concepts and math behind a registered modification to MTheory that is nonperturbative.
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 Supporting Cyber Students Over the Web  Philip Uys
Publications of Phillip Uys whose interests include open learning and distance education via the Internet and intranets ie networked education and its application. Papers include: "Supporting Cyber Students Over The Web: The Online Campus of Massey University
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 Supporting ELLs in Mathematics  Stanford University
Materials that illustrate how Common Corealigned math tasks can support math instruction and language development for English Language Learners (ELLs) in elementary, middle, and high school. Learn about the development of this material from Stanford
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 Supporting SenseMaking and Perseverance  Suzanne Alejandre
Article about how the Math Forum's noticing and wondering not only values each learner, it "also works to engage all learners in finding their mathematical voice." Originally published in the March, 2013, issue of the CMC ComMuniCator, journal of the
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 Suresh Lala's Math Quizzes  Suresh M. Lala
This quiz blog contains questions in algebra, geometry and arithmetic, to test and reinforce math skills and applications.
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 Surface Area of a Cone  NASA Lewis Learning Technologies Project
What is the approximate surface area of a cone whose slant height is 6 inches and whose radius is 3 inches? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 The Surface Area of a Cylinder (SMILE)  Edwina R. Justice, Gunsaulus Academy
A lesson designed to teach students to relate the areas of one rectangle and two circles to the total surface area of a cylinder; relate the circumference of a circle to the base of the rectangular section of a cylinder; and to review the area of a circle.
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 The Surface Area of a Cylinder (Version 2.0) (SMILE)  Edwina R. Justice, Gunsaulus Academy
A grade 8 group activity that uses a phenomenological approach, teaching students to apply concepts to a problemsolving situation. From the Geometry and Measurement section of a collection of almost 200 single concept lessons by the Science and Mathematics
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 Surface Area of a Rectangular Solid  NASA Lewis Learning Technologies Project
What is the surface area of a rectangular solid whose length is 6 centimeters, depth is 5 centimeters, and height is 4 centimeters? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 Surface Distance Between Two Points of Latitude and Longitude  John A. Byers, United States Department of Agriculture  Agricultural Research Service
Enter the latitude and longitude of two points on Earth, and this JavaScript program returns the distance between the locations in kilometers, miles, and nautical miles. Similarly, calculate the great circle distances between over 300 cities. Download
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 Surface Plotter  Yanto Suryono
A Java applet that plots surfaces defined by explicit twovariable mathematical functions (i.e: z = f(x,y)). Surfaces thus plotted may be rotated in any direction.
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 Surfaces Beyond the Third Dimension  Thomas Banchoff
A site that documents an art exhibit hosted by the Providence, Rhode Island Art Club in 1996, featuring computergenerated artwork designed by Tom Banchoff in collaboration with Davide Cervone (now at Union College) and student associates at Brown University.
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 Surfaces (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
A surface, or 2manifold, is a shape any small enough neighborhood of which is topologically equivalent to a neighborhood of a point in the plane. For instance, a the surface of a cube is a surface topologically equivalent to the surface of a sphere.
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 Surfing The Net with Kids: Math  Barbara J. Feldman
The author is a newspaper columnist who collects, reviews, and rates, and sorts by subject internet sites for kids. The site is searchable, and includes various subject areas, a weekly email newsletter, and items for parents and teachers.
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 Surfin' Sinefeld: Flash Animations for Precalculus, Calculus and Statistics  Ralph Irons
Animated graphing calculators for exponential, logarithmic, sinusoidal and
power functions and their derivatives; animated histogram for 5 data sets;
quizzes; Derivative Pong.
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 SURFSTAT australia  Keith Dear; National Centre for Epidemiology and Population Health, The Australian National University
An online text in introductory Statistics from the University of Newcastle. Contents: Summarizing and Presenting Data (Types of Variate; Presenting Discrete and Continuous Data; Charactistics of a Distribution; Measures of Central Tendency and Variability;
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 Surreal Films  Ivars Peterson  Science News Online
Mathematicians have worked out a geometrically optimal transformation that minimizes the energy required to exchange a sphere's inside and outside surfaces. See Selected Images from The Optiverse, a video by John Sullivan, George Francis, and Stuart
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 Survey of the Classes of 1997 Concerning Their High School Math Programs and How Well These Programs Prepared Them for College Math  Gregory F. Bachelis
A Bloomfield Hills School District (BHSD; Oakland County, Michigan) survey comparing the college performances of high school students with differing high school math programs, particularly in response to the the advent of the CorePlus Mathematics Project
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 A Survey of Venn Diagrams  Frank Ruskey; Dept. of Computer Science, Univ. of Victoria, B.C., Canada
Facts and figures about Venn diagrams, particularly as they relate to combinatorial properties of the diagrams: Who was John Venn? What is a Venn diagram? Formal definition of Venn diagrams; General constructions of Venn diagrams. Also Graphs associated
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 Surviving College Algebra  Eric Saunders
A book intended to simplify college algebra for struggling students.
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 Susan C. Levine  The University of Chicago
Biography, courses, and more about Levine, the codirector of the Center for Early Childhood Research. Her freely downloadable articles include "Early puzzle play: A predictor of preschoolers' mental rotation skill"; "The role of parents and teachers
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 Suspension Rates at U.S. Schools  Regents of the University of California
Bar graphs of suspension rates at the nation's schools, based on data from the U.S. Department of Education's Office for Civil Rights Data Collection. Select grades, state, and district(s) to see public school disciplinary information according to race,
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 Swiss Mathematical Society
Membership information; conferences, jobs, news.
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 sxpmaths  Stuart Price
Blog, subtitled "education, maths, procrastination," by an Alevel Maths and Further Maths teacher in southern England "always exploring ideas." Posts, which date back to August, 2013, have included "AS Maths and Mathematical Thinking"; "Reading, Reliability
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 Sybilla Beckmann Kazez
Biography, books, projects, papers, and presentations of the Josiah Meigs Distinguished Teaching Professor of Mathematics at the University of Georgia (UGA). Originally researching arithmetic geometry, Beckmann now considers the mathematical education
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 SyllabusWeb  Syllabus Press, Inc.
From the publishers of Syllabus Magazine, a technology magazine for high schools, colleges, and universities. Highlights of recent issues of the magazine and full text archives of all Press publications. The June 1995 issue covers telecommunications and
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 Syllogism 1.0  Ben Sharvy
Software to download. Enter a syllogism of any length. The program will tell you whether it is a valid syllogism, and if not, why not. It will also analyse the links between terms in the syllogism. BASIC code, and a version compiled for the Mac.
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 The Syllogistic Machine  Johan Mårtensson
A JavaScript machine for checking the properties of Aristotelian syllogisms, with links to Mårtensson's OnLine Logic Book.
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 Sylvan Learning Center
Math help and tutoring, tailored to meet academic goals and needs. Sylvan's teachers create custom learning plans based on assessment, with ongoing evaluations and program updates to continue challenging students. Search by geography to find a center
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 Symbolab  EqsQuest
This semantic search engine for math and science considers the contextual meaning of equations and expressions. Query a mix of text and symbols with Symbolab's pad, which toggles among Greek letters, operators, differentials, and "accents" (vectors, hats,
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 Symbol, Form and Number in Ancient Egypt  Franz Gnaedinger
A book on early mathematics in Egypt, with some social and religious background. Includes a discussion of the use of Pythagorean triples in Egyptian architecture, and hypotheses on the calculation with unit fractions and the approximation of the area
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 Symbolic Computation Group (SCG)  Dept. of Computer Science, University of Waterloo, Ontario, Canada
SCG has as its primary goal the research and development of algorithms for computer algebra, including both symbolic computation and hybrid symbolicnumeric computation. The algorithms developed are incorporated into the Maple computer algebra system.
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 SymbolicNet: Symbolic Mathematical Computation Information Center  ICM; Kent State University
The area of Symbolic and Algebraic Computation (SAC), also known as Computer Algebra (CA), aims to automate mathematical computations of all sorts. SAC research usually combines mathematics with advanced computing techniques. This site includes: introductory
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 Symbolic Solutions Group  Erich Kaltofen
The Symbolic Solutions Group is a group of researchers in computer algebra and related subjects at North Carolina State University. Their articles are available for download, usually in PostScript format, via FTP.
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 SymmeToy  Hank Hufnagel
A Windows program for creating paint patterns, symmetry roses, tessellated art, and symmetrically decorated 3D polyhedron models. The program is easy to learn, fun to use and includes extensive online help. Appropriate for all ages, but especially for
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 Symmetrica  Lehrstuhl Mathematik II, University of Bayreuth
A collection of routines, written in the programming language C, for doing computations in the representation theory of classical and symmetric groups, and related areas. With a list of papers that mention Symmetrica, and a collection of online programs
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 Symmetric Patterns at the Alhambra, with Math Problems  Susan Addington, David Marshall
The Alhambra is a walled city and fortress in Granada, Spain, built during the last Islamic sultanate on the Iberian peninsula, the Nasrid Dynasty (12381492). The palace is lavishly decorated with stone and wood carvings and tile patterns on most of
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 Symmetric Presentations  J. N. Bray
Presentations of groups, symmetric or otherwise, divided into classes to make location easier. Groups that have just one (finite) nonabelian composition factor up to isomorphism are listed in the first seven sections according to the isomorphism type
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 Symmetrier, monstre & tesselationer med The Geometer's Sketchpad  Allan Bergmann Jensen, Kalundborg, Denmark
GSP Symmetries, Patterns and Tessellations. Contains a gallery of wallpaper designs constructed using the Geometer's Sketchpad with JavaSketchpad versions to explore, an illustrated paper on "The Math About Symmetries" (in Danish), a GSP guide, a links
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 Symmetries and the Millennium (Math Chat)  Frank Morgan; Christian Science Monitor
What are the symmetries of a cube in space? What about a hypercube in 4 dimensional space?
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 Symmetry and Group Theory (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
Computational and recreational geometry pointers to sites with information, problems, and lessons having to do with symmetry and group theory (tessellations, kaleidoscopes, origami, etc.).
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