 StopandGo Science  P. Weiss  Science News Online
Viewing traffic flow as a complex system, controllers use mathematical and computer models and simulations in an attempt to decrease congestion. Some computerbased traffic models simulate virtual vehicles that motor by the hundreds or thousands through
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 Storeys Spreadsheet  Dan Pedersen, Henrik Kjaer; Profunda
A 3D spreadsheet for Macintosh that gives you new opportunities when working in the third dimension, created by placing a block of threedimensional cells on top of a spreadsheet, making for a new interaction between the 2D and 3D areas. Copy data from
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 The Storybook of Geometry  ThinkQuest 1996
Learn the basics of geometry and see how they relate to real world situations. Explore and read stories that help to uncover the mysteries of geometry. Story problems (with answers): The Great Space Ace; The Pharoah's Pyramid; The Ice Cream Cone; Filling
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 The Story of Mathematics  Luke Mastin
Summary of major mathematicians and developments of mathematical thought over the centuries, "from its roots in ancient Mespotamia, Egypt and Greece to the abstraction of the modern era.... without getting too technical or getting bogged down in too much
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 The Story of Pi  Project MATHEMATICS!, California Institute of Technology
A videotapeandworkbook module that explores a basic topic in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. Although pi is the ratio of circumference to diameter of a circle, it appears in many formulas that
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 The Strange Case of Emily X  Keith Devlin (Devlin's Angle)
The story of Emily, a mathematical genius in high school who disappeared for 5 years and returned with even greater mathematical ability, and then wrote an autobiography, My Lost Years. An excerpt from Devlin's book, The Math Gene: How Mathematical Thinking
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 Strange Orbits  Ivars Peterson (MathTrek)
Newton's laws provide a precise answer to the problem of determining the motion of two bodies under the influence of gravity. If the solar system consisted of the sun and a single planet, for example, the planet would follow an elliptical orbit. When
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 A Stranger from Spaceland  Ivars Peterson (MathTrek)
An essay about Flatland, Edwin A. Abbott's 1884 "doorway to the fourth dimension and beyond for many explorers of geometry," and "a sharply delineated satire that reflects widely debated social issues in Victorian Britain," particularly women's rights.
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 Strategic Directions in Computer Science Education  Allen B. Tucker, Bowdoin College, Editor
From ACM Computing Surveys, 1996. Abstract: This report identifies major issues and challenges in computer science education across a wide range of institutions. It includes suggestions for improving the quality and effectiveness of computer science and
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 Strategies for Finding Sequences  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about strategies for finding sequences, such as "Write an expression to find the nth term of the following sequence: 3, 9, 18, 30, 45..." and "Find the following 2 terms and a formula for the nth term."
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 Strategy Acquisition and Application (Learning and Mathematics)  Siegler, Jenkins; Math Forum
In this 1989 article, "Strategy Discovery and Strategy Generalization," Robert S. Siegler and Eric Jenkins of CarnegieMellon University discuss how children acquire and apply strategies, looking closely at a small group of students over a long period
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 Strawberry Macaw's Puzzle Page
Although simple, this collection of four logic puzzles provides a challenge for students of any age. The interactive puzzles are: The Fox, the Duck, and the Bag of Corn; The Three Gallon and Five Gallon Cans; The TwentyThree Matches Game; and The Game
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 Stressed Out: Slope as Rate of Change  Cynthia Lanius
It's the night of the big game. You're in the locker room. The coach is pumping the team up. "Now, I know you people are nervous. That's okay, in fact, that's what we want. You're going to perform better on the court (stage) if you're a little nervous."
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 Strings on Your Fingers  Michael P. Garofalo, Red Bluff, California
Links to a host of Web sites, including Web and print bibliographies, with suggestions for where to learn more about string figures and Internet links.
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 Stroh MathPage  Eric Stroh; Northern High School, Owings, MD
Algebra help for students: explanations, examples, practice problems, and hints for all topics covered in a high school Algebra I and Algebra II course. With pictures from Stroh's class and links to other relevant sites on the Web.
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 Stuck on Homework  Royle, Helen; and Watts, Teresa
Sample selftest exam questions and maths video tutorials presented by an experienced maths teacher. Subscribe for full access to hundreds more, as well as a digital whiteboard and other tools.
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 Student Calculus Projects  David Arnold; Mathematics Dept., College of the Redwoods, CA
HTML or Scientific Notebook files. Topics: Equiangular Spiral; Semicubic Parabola; Nephroid; Astroid; Witch of Agnesi; Deltoid; Cassinian Oval; Equiangular Spiral; Quadratix; Ellipse; Conchoid of Nicomedes; Archimedes Spiral; Cardiod; Bernoulli's Lemniscate;
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 StudentCreated Calc III Labs  Cervone, Wicklin; The Geometry Center
Five computer calculus labs that explore the application of mathematics to modeling realworld phenomena. Tangent Planes to Surfaces (exploring the tangent planes and gradient vectors of 2 and 3dimensional curves, examining explicit, parametric, and
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 Student Math Projects, Interlochen Arts Academy  Taoufik Nadji, Malek Physix Inc.
Student essays on various math history topics from around the world. The pages are loaded with graphics, animations, and sounds, and (sometimes backgrounds that result in illegible text. Subjects covered include: Early Math Period (Egyptian, Chinese,
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 Student of Hyperspace  Eric Swab
A series of computer generated projections of analogs of the platonic solids in 4space; a projection of a regular polytope that exists only in 4space. Pages: Hypercube analog of the cube with sections and envelopes; Simplex analog of the tetrahedron
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 Students' Classroom  National Center for Education Statistics (NCES)
This site for students includes links to Find Your School; College Search; What Are Your Chances?; Create a Graph; Fun Facts; Games & Activities; Mascot Game; Quiz; Glossary; and References. See also Dare to Compare, which presents hundreds of questions
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 Student's Difficulties with Proof  Keith Weber; Mathematical Association of America
"Proof is a notoriously difficult mathematical concept for students. Empirical studies have shown that many students emerge from prooforiented courses ... unable to construct anything beyond very trivial proofs. Furthermore, most university students
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 Students' Interest for and Work with AppletEnhanced Word Problems  Renninger, Sinclair, Hand, Stohl, Alejandre, and Underwood
Article from the International Conference on Learning Sciences archive, Proceedings of the 6th international conference on Learning sciences. Abstract: Study of student interest for and work with interactive nonroutine mathematics problems (ESCOT Problems
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 Student standouts tackle ills, theorems  P. Weiss  Science News Online
A project by a young mathematician who proved five theorems also garnered highest honors at the 1999 Intel International Science and Engineering Fair.
Jennifer Pelka, 16, of Orlando, Fla., received a $40,000 scholarship for her mathematics project, which
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 Student's T Distribution  Balasubramanian Narasimhan
The t distributions were discovered in 1908 by William S. Gosset, a statistician employed by the Guinness brewing company, which had stipulated that he not publish under his own name. He therefore wrote under the pen name "Student." This page discusses
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 Studies In Mathematics: Web Discussion  Breindel, Clair; University of Chicago
The University of Chicago's alternative course to calculus. The first quarter is number theory, and the second quarter is geometry and symmetry. When Bryan Clair taught the courses, he covered the history of number systems, different base number systems
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 Studio 4 Learning Math  Studio 4 Networks Inc.
Free online videos that explain topics in algebra, basic math, calculus, differential equations, geometry, prealgebra, precalculus, statistics, and trigonometry. Join Studio 4 Learning's Tutor Corps to share videos of your own.
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 studio:ludens  Wouter Walmink and Alexander Rulkens
Free online tools that "let you play with your own creativity," designed by two Dutch industrial and interaction designers in Eindhoven. Create your own patterns with Repper; your own tessellating coasters with Epa:kato; your own fractals and other complex
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 StudyBeat: Math  StudyBeat
Educational video clips on topics in highschool mathematics, including algebra, basic math, calculus, differential equations, geometry, prealgebra, precalculus, statistics, and trigonometry. Subscription required; sample videos available.
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 Studygeek.org
Lessons, video lessons, formulas, examples, and definitions for learning geometry, algebra, trigonometry, calculus, and statistics.
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 Study Guide for the Advanced Placement Calculus AB Examination  Elaine Cheong
A study guide written to assist students in preparing for the Advanced Placement Calculus AB Exam. Introduction explains the scoring of grades on a scale of 1 to 5. Topics of study include elementary functions, limits, differential calculus, and integral
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 Studying Dimensionality through a StairStep Fractal  Burrill, Frost, Anderson, Burkett, Gribble, Ryerson, & Williams
A background paper and a related classroom activity about a lesson studyproduced activity on using a stairstep fractal to study other dimensions.
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 Studying Mandelbrot Fractals  Suzanne Alejandre
What is a fractal? A definition and a Java applet to help in exploring the Mandelbrot set, redrawing small areas to fill the fractal screen and noticing how the images compare. Also links to other sites with fractal information for middleschoolers.
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 Studying Polyhedra  Suzanne Alejandre
What is a polyhedron? A definition and a Java applet to help in exploring the five regular polyhedra to find how many faces and vertices each has, and what polygons make up the faces. Also links to a page of information about buckyballs, stories written
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 Study Island
Internetbased standardsmastery products, based on state standards. Subscriptions are available for single classes through districts, with individual subscriptions available for GED products.
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 studymaths.co.uk  Jonathan Hall
Free help on your maths questions. See also the bank of autoscoring GCSE maths questions, games, and resources such as revision notes, interactive formulae, and glossary of terms.
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 StudyPug  Dennis Lee
Homework help and tutoring services for algebra, geometry, precalculus, trigonometry, calculus, and more. Preview some topics, all of which include interactive problems and video of Lee working through exercises.
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 Stupid Calculations  Josh Orter
Repository "where practical facts get rendered into utterly useless ones." Posts, which date back to May, 2013, have included "Monophone," musing on the size of the screen made from ripping the displays out of every iPhone ever sold and combining them
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 Style Line: Wheel Trim and Simulators for the 21st Century
Wheel covers to investigate for reflectional and/or rotational symmetry.
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 Subject:Mathematics  Wikibooks
This Wikimedia project for collaboratively writing opencontent textbooks also produces, under its Wikijunior project, ageappropriate nonfiction children's books illustrated with photographs, diagrams, sketches, and original drawings.
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 subtangent.com  Duncan Keith
With Flash, explore interactive investigations such as Number Stairs and Diagonal Differences. Play Mathionaire, based on the popular TV game, but with maths questions. Quizzes include Function Machines, Number Properties, Pythagoras, and Quadratics 1.
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 Subtle Logic, Winning Game  Ivars Peterson (MathTrek)
Seemingly simple games can serve as thoughtprovoking exercises in mathematical logic. They can provide deep insights into subtle issues that confront logicians who are interested in the foundations of mathematics. Socalled Ehrenfeucht games have proved
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 Succeed in: Math! Assessment and Remediation Software
Selfpaced software designed to assess student math skills, identify weaknesses and create a customized tutorial based on each student's needs. The program incorporates animation, text and bilingual narration (English/Spanish) with interactive practice
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 Success for All
Curriculum driven by cooperative learning that focuses on individual pupil accountability, common goals, and recognition of team success, all with the aim of getting learners "to engage in discussing and explaining their ideas, challenging and teaching
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 Successful STEM Education  EDC, Inc.
Information, events, and resources that highlight promising practices and tools in support of effective K12 science, technology, engineering, and mathematics (STEM) education in schools and programs. Resources of this National Science Foundation (NSF)
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 SuccessMaker mathematics courses  Pearson Education, Inc.
A learning environment combining a management system, assessment, and curriculum resources to provide administrators, teachers, and students with tools to improve academic performance. Also available from http://www.pearsonschool.com/index.cfm?locator=PSZk99.
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 Sudoku
Flashbased game: enter a 9x9 grid so that every column, every row and each of the nine 3x3 segement contains the numbers 1 to 9. The game provides hints when you are stuck and has different levels.
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 Sudoku  Pappocom, aka Wayne Gould
Finish filling in the 9x9 grid so that every row, every column, and each of the nine 3x3 boxes contains the digits 1 through 9. Different from a magic square, this puzzle requires no arithmetic, only reasoning and logic to deduce which digit to put where.
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 Sudoku  PedagoNet
Sudoku online. New puzzles generated regularly; archive of past puzzles.
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 Sudoku Shuffle  ridiculopathy.com
Play a Flash version of Sudoku online or print out one of these logic puzzles. Choose a level of difficulty and whether to play with number tiles or letter tiles.
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