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  1. SIMMS IM LEVEL I - Research Project Help - T. DeBuff
    High School freshman-level integrated mathematics research projects, to be used with the Systemic Initiative for Montana Mathematics and Science Integrated Math (SIMMS IM), curriculum Level I. View project descriptions and find links to sites that will ...more>>

  2. Simple City - Richard Elwes
    Website of the author of, among other books, Mathematics 1001, How to Build a Brain (Mathematics without the Boring Bits), and Chaotic Fishponds and Mirror Universes. Prior to lecturing at the University of Leeds, Elwes earned his PGCE (QTS) in secondary ...more>>

  3. Simple Minds, Smart Choices - Bruce Bower - Science News Online
    The Center for Adaptive Behavior and Cognition at the Max Planck Institute for Human Development in Berlin has launched a project to explore the impact of bounded rationality on human judgment. The group focuses on what it calls "fast and frugal" formulas ...more>>

  4. Simple Online Tools - Solvid
    Unit and currency converters, calculators, a random number generator, and more. ...more>>

  5. Simplified Solutions for Math
    Curricula (lesson plans, pratice work sheets and tests) for Algebra, CAHSEE, and General Math, aligned to the California Department of Education's Mathematics Framework for California Public Schools. ...more>>

  6. Simplifying Equations of the Form ax+b=cx+d (SMILE) - William F. Wagner, Hyde Park Career Academy
    A lesson designed to teach students to solve equations of the form ax+b=cx+d; and to visualize the concept of "balancing" an equation. From the Algebra and Trigonometry section of a collection of almost 200 single concept lessons by the Science and Mathematics ...more>>

  7. Simply Statistics - Leek, Jeff; Peng, Roger; and Irizarry, Rafa
    Biostatistics professors Leek, Peng, and Irizarry "are fired up about the new era where data are abundant and statisticians are scientists." Their blog, which dates back to September, 2011, has included posts such as "Pre-cog and stats," "Kindle Fire ...more>>

  8. simpsonsmath.com - Sarah J. Greenwald and Andrew Nestler
    The animated sitcom The Simpsons "contains over a hundred instances of mathematics, many designed to expose and poke fun at innumeracy," which make it "an ideal source of fun ways to introduce important concepts to students, and to reduce math anxiety ...more>>

  9. Simtel.Net - Digital River, Inc
    A distribution network for shareware, freeware, and public domain software. Browse or search for programs running on the platforms of Windows 95/98, DOS, or Windows 3.x. Windows 95/98 math-related programs range from abacus instructional packages to an ...more>>

  10. Simulating Society - Ivars Peterson (MathTrek)
    Computer simulation offers a powerful tool for studying human social behavior, contends Richard J. Gaylord of the University of Illinois at Urbana-Champaign. A theoretical physicist turned computational sociologist, Gaylord has developed models of social ...more>>

  11. Simulations Nab Protein-folding Mistakes - Ivars Peterson - Science News Online
    The human body manufactures thousands of different proteins, which act as enzymes, structural elements, or carriers. Each protein starts out as a long strand that must fold itself into the proper shape to perform its specific function. To gain insights ...more>>

  12. The Sine Function (SMILE) - Ronald G. Sienkiewicz, Prosser Vocational High School
    A lesson designed to familiarize students with the concept of the sine function by defining, graphing, computer generating, using a "shop created" blackboard sine wave generator, and by presenting examples of natural phenomena which result in sine wave ...more>>

  13. Sine of the Times: Dividing the Universe by Zero - Colin Graham
    A collection of thoughts on math by an "eternal student" with an "eclectic educational background." Posts, which date back to June, 2010, have included "Creative ways of integrating more water in the body," "My first online manipulative -- virtual origami," ...more>>

  14. Sines and Cosines, Part 1 (Periodic functions) - Project MATHEMATICS!, California Institute of Technology
    A videotape-and-workbook module that explores a basic topic in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. Sines and cosines occur as rectangular coordinates of a point moving on a unit circle, as graphs related ...more>>

  15. Sines and Cosines, Part 2 (Trigonometry) - Project MATHEMATICS!, California Institute of Technology
    A videotape-and-workbook module that explores a basic topic in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. This program focuses on trigonometry, with special emphasis on the law of cosines and the law of sines, ...more>>

  16. Sines and Cosines, Part 3 (Addition formulas) - Project MATHEMATICS!, California Institute of Technology
    A videotape-and-workbook module that explores a basic topic in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. Animation relates the sine and cosine of an angle with chord lengths of a circle, as explained in Ptolemy's ...more>>

  17. SingaporeMath.com Inc.
    Formerly "Family Things," this family business located in Oregon, USA provides information, sample pages, and ordering information for the Singapore mathematics and science curricula, with sample placement tests for the New Elementary Math Series, sample ...more>>

  18. Singapore Math - Yan Kow Cheong
    News and updates on Singapore Math from Cheong, a math coach, writer, editor, and life member of the Singapore Mathematical Society (SMS) and the Association of Mathematics Educators (AME) whose author credits include "Mathematical Quickies & Trickies." ...more>>

  19. singingbanana.com - James Grime
    YouTube videos, "lazy microblog," and social networking hub of Enigma Project Officer James Grime, who "hopes to explain to kids and general audiences why he love his maths so much, to challenge some of the public's misconceptions, and to explain why ...more>>

  20. SINUS transfer - University of Bayreuth
    Spurred by the outcome of the Trends in International Mathematics and Science Study (TIMSS), Germany launched a nation-wide "model programme for increasing efficiency in mathematics and science education." Between 1998 and 2007, more than 1800 of the ...more>>

  21. Sir Roger Penrose - World of Escher
    Recreational math is the passion of Sir Roger Penrose, who was recently knighted for his outstanding contributions to mathematics. Penrose is a professor of mathematics at the University of Oxford in England, where he pursues an active interest in recreational ...more>>

  22. Sir William Rowan Hamilton - D.R. Wilkins; School of Mathematics, Trinity College, Dublin
    Material relating to Sir William Rowan Hamilton, including his letters and papers describing mathematical optics and conical refraction, dynamics, the theory of algebraic couples (complex numbers), the theory of equations, and quaternions; a memorial ...more>>

  23. 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, t-test, Fisher exact, two by two table, ordinal tests, ...more>>

  24. A Site For Cyber Eyes - BZLeonard
    Fractals, graphics, photos and altered photos, 3D graphics, links, Sherman's Humor Column, and Ginger's Diary (A teenager describes being bombed by the Japanese on December 7, 1941). ...more>>

  25. Sites with Problems Administered by Others - Math Forum
    Problems of the week or month: a page of annotated links to weekly/monthly problem challenges and archives hosted at the Math Forum but administered by others, and to problems and archives elsewhere on the Web, color-coded for the level(s) of the problems ...more>>

  26. Sketches for Cabri Geomètre (v. 1) - L. J. Dickey, University of Waterloo
    Cabri Geomètre (the original version of of the program) figures to download (binhexed): Conic Given by Five Points; Ten Sketches of Desargues Theorem; Harmonic Conjugates; The Inverse of a Circle; The Inverse of a Line; The Inverse of a Point; ...more>>

  27. Sketches of Topology - Kenneth Baker
    Visualizations, often created with Sketchup, of low dimensional topology. Blog posts, which date back to November, 2007, have included "Twisted Saddles," "Scharlemann cycles," "Long Disks and Lopsided Bigons," "Ko Honda's Octahedral Relation," "Berge ...more>>

  28. Sketch Exchange - Key Curriculum Press
    Share Sketchpad activities, tips, questions, and ideas in this online community dedicated to the dynamic geometry software. Browse sketches by grade level, topic, or tags. ...more>>

  29. SketchMad - Nathalie Sinclair
    An archived resource, not currently updated: A resource center devoted to using The Geometer's Sketchpad in the classroom. Includes tips, strategies, lesson plans, and sketches for beginning and intermediate Sketchpad teachers, stories from the classroom ...more>>

  30. Sketchpad 3.0 Gallery - Finzer, Jackiw; Key Curriculum Press & The Math Forum
    A collection of sketches and scripts that show off new features of version 3 of the Geometer's Sketchpad in categories: Arcs and Architecture; Algebra and Beyond; Physics; Statistics; Curves; and Poincare Disk. ...more>>

  31. Sketchpad Activity Center - Bill Finzer, Key Curriculum Press
    Interactive lessons for use with an early version of the Geometer's Sketchpad. Construct a fractal tree using a recursive script; use the Point on Object command to study random phenomena. These lessons have been used in Key Curriculum Press's summer ...more>>

  32. Sketchpad Homework - Math 5337, The Geometry Center
    A set of classical geometry problems created to introduce and teach basic commands for using The Geometer's Sketchpad. Created for Math 5337, Technology in the Geometry Classroom, at the Geometry Center, University of Minnesota. ...more>>

  33. SketchUp - Robert Lang
    Tutorials, tips, tricks, and more about the 3D modeling software. Lang, a professional woodworker, cabinetmaker and designer who serves Popular Woodworking Magazine as its Executive Editor, uses SketchUp to design woodworking projects, and as the basis ...more>>

  34. Skill in Algebra - Lawrence Spector
    An introduction to algebra, with questions that, when moused over, reveal their answers: algebraic expressions, signed numbers, adding and subtracting signed numbers, multiplying and dividing signed numbers, reciprocals and zero, removing grouping symbols, ...more>>

  35. Skills and Competencies Needed to Succeed in Today's Workplace - NCREL: North Central Regional Educational Laboratory; Learning Point Associates
    Because the world of work is changing, the U.S. Departments of Labor and Education formed the Secretary's Commission on Achieving Necessary Skills (SCANS) to study the kinds of competencies and skills that workers must have to succeed in today's workplace. ...more>>

  36. 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 two-year $900,000 grant from the NSF to construct the Mathematical Sciences Digital Library (MATHDL). ...more>>

  37. Skydome Unit Plan - Ruth Carver, Margaret Sinclair
    A unit suitable for grades 7-11 with the objectives: to review many different mathematical skills; to work on a unit that connects with the "real world"; to improve reading for information skills. Questions include: What is the lowest price for a seat ...more>>

  38. Skymath National Weather Report Module
    An overview of an instruction unit in which students produce a national weather report and a report on their understanding of various weather phenomena. The unit ties together number sense, symbols, and graphics; emphasizes sorting and counting and making ...more>>

  39. Slates, Slide Rules, and Software: Teaching Math in America - Smithsonian National Museum of American History, Behring Center
    An exhibit on mathematics teaching devices from the Smithsonian's National Museum of American History, focusing on innovations in mathematics teaching from the blackboard to graphing calculators and computer software. ...more>>

  40. 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 Fifteen-like puzzle that can be played ...more>>

  41. The Slide Rule Universe - Sphere Research Corporation
    Slide rule information, lessons, archives, links and an on-line marketplace: buy, bid for, or swap restored classics, new slide boxes still in the box, and low cost first student rules; learn to operate and care for your slide rule, from Hartung's "A ...more>>

  42. Sliding Pi - Ivars Peterson (MathTrek)
    "The entrance to the Downsview subway station in Toronto presents visitors with a striking vista. A vast mosaic of square tiles sweeps across a curved wall, inviting viewers to trace its lines and ponder intriguing irregularities in its color scheme ...more>>

  43. The Sliding Triangle - Paul Kunkel
    Investigate ellipses by tracing triangle transformations. ...more>>

  44. Slinky Science - National Engineers Week Committee
    Classroom activities include Racing Slinkys, which describes how inertia, gravity, potential energy, kinetic energy, and longitudinal waves are demonstrated when the Slinky "walks" down stairs or an incline; Slinky Waves, which outlines how Slinkys exhibit ...more>>

  45. Sloan Digital Sky Survey
    The astronomical surveys of the Sloan Digital Sky Survey (SDSS) have "obtained deep, multi-color images covering more than a quarter of the sky and created 3-dimensional maps containing more than 930,000 galaxies and more than 120,000 quasars." SDSS's ...more>>

  46. Slocum Puzzles - Jerry Slocum
    Puzzle collector and author's site. Features puzzle descriptions, shop, descriptions of books written by Slocum and collaborators, and a history of Slocum's famous Puzzle Parties. ...more>>

  47. Slopes and Ski Trails (Why Slopes and More Math) - Alan Selby
    What is calculus? If you have ever seen or gone skiing or just walking over hills then you know about slopes and you have met or felt basic ideas in calculus. Calculus in the first instance is the subject of slope computation and interpretation, and the ...more>>

  48. Slope, Slope-Intercept, Standard Form - Math Forum, Ask Dr. Math Common Question
    A selection of answers to questions about the slope of a line, and about the slope-intercept and standard forms of the equation of a line, such as "Why are the slopes of perpendicular lines negative reciprocals?" and "How would I draw the line y = (2/3)x ...more>>

  49. Small Group Interactions (Learning and Mathematics) - Susan Bobbitt Nolen; Math Forum
    In this 1991 article, "Small-group interactions as a source of learning opportunities in second-grade mathematics," Yackel, Cobb, and Wood, of Purdue University Calumet, Vanderbilt University, and Purdue University, respectively, describe an experiment ...more>>

  50. A Small Puzzle - Joe Fields
    The site offers a visual proof that the sum of the first n consecutive odd numbers is n^2, the "L"-decomposition. ...more>>

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