 Sage: Open Source Mathematics Software  William Stein, University of Washington
An open source mathematics program designed to do everything from map a 12dimensional object to calculate rainfall patterns under global warminganything Maple, Matlab, or Mathematica would do. This free software reveals how it performs its calculationsso
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 Sales Tax and Discounts (SMILE)  Denise Folk, Richard E. Byrd Academy
A lesson for grades 68 designed to teach students that sales tax is an additional charge on products purchased; how to compute sales tax on different items using register tapes; that discount means to take a certain amount off the price of something;
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 Sales Tax (SMILE)  Allen Batts, Jr., Jane A. Neil School
A lesson for grades 68 designed to teach students to understand and calculate sales tax on merchandise and food. From the Practical and Applied Math section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative
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 Salinon: From Archimedes' Book of Lemmas  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A description of Archimedes' application of propositions from the second book of Euclid's Elements to mathematical proofs. An interactive Java exploration is provided.
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 Salt Creek Investigation  LaceyAnderson, Provus; Carl Sandburg Jr. H.S., Rolling Meadows, IL
This interdisciplinary study of Salt Creek involves junior high students in the examination of authentic community problems. Through the use of technology and other community resources, students are introduced to water quality issues and develop proposals
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 Saltire Software
Mathematical technology for industry and education. Saltire Software's core technologies are constraintbased interactive geometry systems, symbolic algebra, and optimization, with products for mechanical engineering, mathematics education and layout
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 SAM Learning  SAM Learning Ltd.
U.K. exam revision (review) for A Levels (age 1618), GCSEs (age 1416) and SATs (KS3, age 1114; KS2, age 711; KS1, age 57). Draganddrop exercises and online tests of math knowledge.
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 Sam Loyd Official Site  The Sam Loyd Company
This site is dedicated to introducing Sam Loyd and his puzzles to a whole new generation. Loyd was a famous puzzle inventor in the 1800s, till his death in 1911. Puzzles with answers, descriptions of famous puzzles for sale, FAQs and other information.
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 SAMMO  Sinclair, Nathalie; Murphy, Pat; et al.
Tools for exploring, creating, and doing mathematics. Sinclair's Java applets let middle school students explore appealing mathematical situations not normally included in school curricula while using fractions, ratios, decimal numbers, and other concepts
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 Sampling and the Census  Ivars Peterson  Science News Online
Despite strong support from statisticians, the Census Bureau's plan to increase the use of sampling in the next census has met resistance in Congress.
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 Sam Speed's Home Page  Sam Speed
Using linear programs to calculate graph parameters. The adjacency number of a graph is the adjacency matrix of the graph sorted and compressed into a unique hexidecimal number. Formats: LaTeX, dvi, pdf, ps.
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 Samuel Arbesman
Research and writings by the author of The HalfLife of Facts. As an applied mathematician and network scientist, Arbesman's delves into the science of science, nature of productivity and prosocial behavior within cities, the structure and function of
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 San Antonio Technology in Education Coalition (SATEC)  Paul Tisdel, Project Coordinator
A mathematics curriculum project funded by the U.S. Dept. of Education to create mathematics lessons that seamlessly and appropriately integrate technology into instruction. Download PDF files on functions in algebra; technologies used include Vernier
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 San Diego Math Tutor  Juan Castaneda
Math Tutor in San Diego. Offering test preparation and help with Algebra, Calculus, Geometry, Trigonometry, and Statistics.
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 San Diego Tutor
A San Diegobased inhome tutoring company, San Diego Tutor offers a Scholarship program for clients who can't afford high school math and science tutoring.
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 Sandpiles in Graphs  Angela R. Kerns
Research into sandpiles in graphs, related to previous research by others in several areas including include sandpiles in grids and chipfiring games; also sandpile rules as algorithms for information dissemination problems. An application of cellular
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 The Sands of Time  Troy Jones
The author uses ridges in piles of salt to model geometric concepts. This page features an article (PDF format), PowerPoint presentation, Geometer's Sketchpad file, and textbook reference for a classroom exploration of such concepts.
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 Sangaku  Hiroshi Kotera
Click on the map of Japan to see photographs of sangaku  Euclidean geometry theorems rendered as colored drawings on wooden tablets, and hung in shrines or temples  dating to the Edo period (16031867). Also, learn how to use counting rods, called
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 Sangaku, Japanese Temple Geometry  Tony Rothman, Princeton University
For centuries in Buddhist and Shinto shrines, Japanese have hung wooden tablets containing mathematical problems. Read PDF or PS downloads of a tutorial on the inversion method for solving Sangaku, or of the article "Japanese Temple Geometry," which first
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 Sangaku: Reflections on the Phenomenon  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A collection of sangaku problems with Java simulations and complete solutions, preceded by an introductory article that promotes an unorthodox view point on the wonderful phenomenon of Temple Geometry.
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 The Saqquara Ostrakon  A. D. Conner
An article with background history and a new analysis: A unique 3rd Dynasty (~2600 B.C.) Egyptian artefact thought to be an architect's drawing has heen reevaluated by the author and the geometry reveals surprising results.
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 Sara Billey
Sara Billey researches combinatorics, algebra, Lie theory, algebraic geometry and probability. Her papers on these topics may be downloaded in PostScript or gzipped PostScript format. The syllabi and problem sets for her undergraduate courses, i.e.
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 Sarah Glaz
Teaching, research, books, and articles by the algebraist, ring theorist, and poet. See, in particular, the math poems of undergraduate students and Glaz's own poetry, which includes "Mathematical Modeling," "A Pantoum for the Power of Theorems," "I am
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 sarahmarie belcastro's home page  SarahMarie Belcastro
From one of the authors of Making Mathematics with Needlework: "I seem to have become a topological graph theorist while I wasn't looking. I am also interested in convex and combinatorial geometry, algebraic geometry, topology, algebra, the geometry of
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 Sara VanDerWerf
Blog by a longtime teacher of secondary mathematics in the Minneapolis Public Schools and past president of the Minnesota Council of Teachers of Mathematics (MCTM). VanDerWerf spent several years leading mathematics at the district office and curates
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 The SAT: Aptitude or Demographics?  Glenn Elert
A paper discussing the SAT's validity, coachability, biases, and implications, especially with respect to race and socioeconomic status.
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 SAT Free Math Practice  Roland Mfondoum
Download free SAT prep math worksheets, take autoscoring quizzes online, and watch videos on algebra and functions, factorization, polynomial expression expansion, linear equations and inequalities, quadratic equation solving, numbers and operations,
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 Satlink  Missouri School Boards Association (MSBA)
A monthly national magazine that serves as a guide to educational satellite teleconferences and programs concerning most K12 subjects, including many math areas. These programs can be a source for new information or an additional resource for current
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 SAT Math Pro  Colleen King
Interactive video lessons, timed quizzes, and other instruction for SAT math preparation, categorized into assess, practice, and strategies.
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 SAT Math Section Overview  SATPeer
Overviews of the geometry and algebra found on the SAT. SATPeer also posts articles of standardized testtaking strategies, review guides, and tools.
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 SAT Prep Plan  Wendlink
Free SAT study content including streaming video, a custom study plan creator, and many practice problems.
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 SATs Papers  Ian Skinner
Almost a thousand free SATs past papers, Mental Maths audio listening tests, teacher's marking schemes and other SATs test papers, including Key Stage 1 (KS1), Key Stage 2 (KS2) and Key Stage 3 (KS3), Maths and Science SATs past papers; and more than
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 SAT Test Prep  Ivy West
An online interactive SAT course, with animation, sound, live tutor help, and learning games.
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 Saturday Academy
Saturday Academy (SA) "gives kids learning experiences that get them excited about school, help them explore potential careers, discover their intellectual possibilities, and teach them to be lifelong learners." Targeting the youth and profesionals of
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 Savard Software
Windows shareware and freeware, including Master Converter (which converts over 580 units in more than 30 categories, with the ability to add your own units and categories) as well as a program launcher and various desktop utilities.
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 Saxon Publishers, Inc.  Harcourt Achieve
Saxon publishes educational textbooks and other teaching materials for the primary and secondary education markets (Grades K12) as well as for the home study market. The Saxon method of teaching math stresses "fundamentals." Site includes lists of inservices,
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 sbParserSDK 3.6 for Win32  Joerg Koenning
A program that provides an easy way to create an sbParser object that can solve mathematical functions of any length. You can declare up to 24 variables (6 with the ActiveXcontrol) that can be defined and redefined, which is useful for fast calculations,
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 SCalculate  Sookshma Chetas Softwares Pvt. Ltd.
Key values into the boxes to expand algebra expressions, calculate geometry areas and volumes, and convert weights, distances, time, memory, and other units.
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 Scale Drawing Project  Diane Coates
A lesson plan: Choose a picture like a cartoon or a greeting card, etc. It is best not to choose a photograph. Decide what scale factor will enlarge your original drawing to an appropriate size for a standard size poster board (i.e. 1:3, 1:4, 1:5, 2:7
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 The Scale of the Universe 2  Cary and Michael Huang
Use the scroll bar or computer mouse wheel to zoom in and out  from quantum foam to charm quarks to "smallest thing visible to an optical microscope" to the thickness of paper all the way up to Cruithne, the depth of the Mariana Trench, Minecraft World,
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 Scales of Measurement  Niel Brandt
An extensive list of physical and mathematical events and objects in ascending values and orders of magnitude.
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 Scaling Up Innovative Practices in Mathematics and Science  Carpenter et al.
Download a PDF of a research report that clarifies the meaning of the phrase "learning with understanding," describes the nature of successful professional development, and outlines how to scale successful practices. The research by Thomas P. Carpenter,
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 Scenes from a Dynamic Math Classroom  Ihor Charischak
In a dynamic math classroom, "discourse between teacher and students produces engagement and learning." Posts, which date back to July, 2008, include ISTE 2011 Reflections  My presentation," "Crowdsourcing Jr. Classroom Activity," "Supermarkets marketing
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 Scheduling Random Walks  Ivars Peterson (MathTrek)
Among networked computers, some sort of software scheduler must regulate data flow, but proving that a given scheduler not only prevents conflicts but also performs its duties efficiently can be surprisingly difficult. Computer scientists have found that
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 Scholarly Societies Project  Mathematics  University of Waterloo Electronic Library
A subject page created by compilers at the University of Waterloo Library to facilitate access to websites maintained by or for more than 80 scholarly mathematics societies across the world: an alphabetical list by society name, followed by its acronym.
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 Scholars Journal of Physics, Mathematics and Statistics  Habibur Rahman
This electronic, open access journal began publishing freely downloadable articles quarterly in June, 2014.
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 Scholastic, Inc.
Information about Scholastic, Inc., a global children's publishing and media company in education and entertainment (curriculum, magazines, books, film, TV, and multimedia). Classroom activities and reproducibles (e.g., math) teacher talk, separate parents
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 Scholastic Online Activities  Math  Scholastic, Inc.
Lessons and activities for grades PreK3 or 48, with sources listed: Kids USA Survey; Max's Math Adventures of interactive whiteboardready rhyming math activities, audio support, and printables; Math Maven's Mysteries; I Spy Oops Hoops; Math Hunt; and
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 Schoolhouse Flash  Screenic Digital
Addition, subtraction, multiplication and division flash card sets online. Animated math fact equations in Level One for kids to count. Practice cards in Level Two reveal the answer upon a mouse click. Level Three offers a choice of 3 or 5 seconds to
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 Schoolhouse Rock
Schoolhouse Rock is one of many artifacts from the 1970s that still is in existence today. In the mid70s, ABC TV aired these short cartoons, which taught a generation about government, history, grammar, science, and math. The lyrics of all the songs
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