 The Art of Problem Solving  Richard Rusczyk
An online school and community, with a message board and widely used textbooks, e.g., The Art of Problem Solving by Sandor Lehoczky and Richard Rusczyk. See, in particular, the AoPS's Math Jams, guided improvisational problem solving sessions. Also, learn
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 Arts & Crafts Class: Let's Fold Origami  Japan Window Project, Stanford University and NTT
Directions for folding an origami crane and a yakko (in the Edo Period, a Yakko was known as a male servant or a valet to a highclass samurai. The figure shown is a representation from the waist up. The diamond shape is the head and it is possible to
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 ASA Student Poster Competition  American Statistical Association
A competition that encourages students and teachers K12 in the United States and Canada to display data in creative ways. The purpose of the poster is to tell a statistical story visually, illustrating conclusions that can be drawn from data. With links
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 ASCII Shop  ridiculopathy.com
Graphically lay out and format ASCII art. Toggle through standard keyboard symbols, then "paint" them onto the monospace "canvas," and apply effects such as clearing, lightening, darkening, filling, stroking, blurring, and flaring. To capture a textfriendly
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 Ask Adam Online Mathematics Tutors  Adam Moore
K12 students are invited to fill out a Web form and submit a math question (only one per submission). Tutors may register to answer questions. Some answers are available in Ask Adam's searchable archives. Math tools include online graphing calculator,
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 Ask a Mathematician / Ask a Physicist
"Your math and physics questions answered." Blog posts, which date back to October, 2009, originate from questions posed via email, at the duo's stand at Burningman, in person by friends, or "this one time in Union Square": "How do I find the love of
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 Ask An Expert  Pitsco
Experts on subjects from Amish to Zookeeping. Select from 12 categories with over 300 web sites and email addresses where you can find experts to answer your questions. Ask an Expert is a directory of links to people who have volunteered their time to
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 Ask A Science/Math Expert  Stevens Institute of Technology, Center for Improved Engineering and Science Education (CIESE)
Links to science and math askanexpert services, organized into general science, astronomy and space science, biology and life sciences, physics, oceanography, geology, and weather.
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 Ask Dr. Math FAQ  Math Forum
Frequently asked questions from the archives of the Math Forum's question and answer service for K12 math students and their teachers, with classic problems, formulas, and other recommended math sites.
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 Ask Dr. Math  Math Forum
The Math Forum's question and answer service for K12 math students and their teachers. A searchable archive is available by level and topic, together with a FAQ.
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 Ask Dr. Universe  Washington State University
A site that allows young users to ask or find interesting questions and puzzles to solve. It features a question of the day and an archive of questions and answers by faculty at Washington State University; featured questions; and links to related sites.
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 Ask Jeeves for Kids  Ask Jeeves, Inc.
An easy question&answer site where kids can ask questions and find more questions on the topic to choose from. Example: Where can I find information on division?
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 Asknumbers.com
Online conversions between different measures of length, weight, temperature, pressure, energy, frequency and more.
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 Assessing True Academic Success: The Next Frontier of Reform  Dan Kennedy, Baylor School
Article from Mathematics Teacher 92, 46266, September 1999. "Suppose that your doctor's idea of a successful medical practice is to teach his patients how to pass every diagnostic test that he gives to them. How will you ever know if you are healthy?
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 The Assessment Challenge in Statistics Education  Iddo Gal and J. B. Garfield (eds.)
A book that discusses conceptual and pragmatic issues in the assessment of statistical knowledge and reasoning skills among students at the college and precollege (K12) levels, and the use of assessments to improve instruction.
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 Assessment  Classroom Compass
The spring 1996 issue of Classroom Compass examines assessment as an integral part of the learning cycle. One activity, Thinking Aloud About Mathematics, provides an innovative idea for assessing student learning in a high school mathematics classroom.
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 Assessment in Mathematics Teaching  Mathematics Education at The Math Forum
The Math Forum's suggested sites on assessment in mathematics education including the NCTM Standards; sessions on assessment at meetings; and selected books and articles on assessment.
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 Assessment Resource Center (ARC)  University of Missouri
The ARC "promotes the practice, enhances the understanding, and advances the use of assessment in education, business, and the professions." ARC develops and applies measurement instruments and research and evaluation services, offering project management
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 Assessment Resources: Math  Cynthia Good
A list of links to guides, standards, curricular frameworks, activities, tests, and other resources for assessment in mathematics.
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 Assessment Suggestions  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How can I assess my students at the beginning of the year? Midyear? Throughout the year?
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 Assignment Calculator  The University of Minnesota
Enter the date you will begin an assignment and its due date, then select a subject area such as mathematics, and the Assignment Calculator will outline steps to take to complete the work on time.
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 Association for Advancement of Computers in Education (AACE)
A searchable site, with divisions/societies/chapters; major journals; The AACE listserv, EDUCTECH; Educational Technology Review (the Association member periodical); special publications; and conferences with workshops, and proceedings devoted to advancing
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 Association for Supervision and Curriculum Development (ASCD)
A site designed to provide relevant and current educational resources to members, with an emphasis on ASCD materials and sources of international and federal government information, in particular state and local government sources. Also a forum for worldwide
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 The Association of State Supervisors of Mathematics
A network for those who provide supervising and/or consulting services in the area of mathematics as a staff member of the education agency of their US states, territories, or protectorates; Canadian provinces; or other regions. Request membership information;
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 Association of Teachers of Mathematics (ATM)
A U.K.based association that aims to support the teaching and learning of mathematics by encouraging increased understanding and enjoyment of mathematics. It addresses all those concerned with mathematics education in primary schools, secondary schools,
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 ASTER: Mathematics For Computer Generated Spoken Documents  T. V. Raman
AsTeR, an Audio System For Technical Readings: a computing system for rendering technical documents in audio, dedicated to the author's guidedog. Demo. Audio LaTeX postscript. Examples cover simple fractions and expressions; superscripts and subscripts;
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 Astronomiae Historia / History of Astronomy  International Astronomical Union, Astronomische Gesellschaft
General history of astronomy pages on the Web: a catalog of archives and libraries, museums, memorials, historical places and exhibits, research institutes and departments, publications, and other sources of information. Visitors can read five different
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 Astronomy Calculator  R.T. Back
The Astronomy Calculator provides general information about the phases of the moon and planets, and annual meteor showers. You supply the date, time of observation, and the number of hours east and west from directly overhead.
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A Supplemental Introduction to Algebra  Rick Garlikov
Some things algebra books don't tend to tell students, but which Garlikov thinks are important for them to know so that they can understand what algebra is about and see, in a sense, how it works. Also The Way Algebra Works.
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 Asymptopia Software  Charles Cossé
Free math games include TuxMathScrabble, which challenges players to construct compound equations in the manner of Scrabble; Multiplication Station, which provides practice in addition, subtraction, and multiplication; and MakeItTrue, a web application
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 The Atoms Family  Miami Museum of Science, Science Learning Network
An online exhibit containing educational activities relating to different forms of energy, as presented by famous gothic horror characters. Activities include: The Mummy's Tomb (energy conservation, kinetic, and potential energy), Dracula's Library (properties
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 Audiblox  Susan du Plessis
Audiblox is a system of cognitive exercises, aimed at the development of the skills foundational to reading, spelling, and writing. A resource for dyslexia, dysgraphia and other learning disabilities.
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 Austin Math  Tutor  Tim Pham
AustinMath.com is a private tutor service that specializes in Math and Science.
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 Austrian Center for Didactics of Computer Algebra (ACDCA)
Download teaching examples, materials, and exams that use Computer Algebra Systems (CAS)  in particular, the TI92 calculator. With bugs, tips and cheats in handling the TI89, TI92, and Texas Instruments Voyage200. Also, get news about the Center
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 Authentic Assessment in Mathematics  Daley, Diamond, Handy, McKenzie; The Geometry Forum
A group project carried out at a Geometry Forum Summer '94 Workshop at Swarthmore College, Swarthmore, PA. The goal of this project was to collect and organize available INTERNET resources on Authentic Mathematical Assessment applicable to Secondary Schools.
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 Authentic Assessment Toolbox  Jon Mueller
A howto text on creating authentic tasks, rubrics and standards for measuring and improving student learning, including an introduction to the topic with comparison to traditional testbased assessment, why and how best to use it, standards, tasks, rubrics
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 Autograph (Mathematics)  Eastmond Publishing Ltd
Autograph is visualization software that operates in two modes: graphs, coordinates and bivariate data; and singlevariable statistics and probability. Resources include graphs, statistics, screencam demos, Microsoft Word worksheets, PowerPoint presentations,
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 Automated Geometry Java Applet Generation  Saltire Software
Prototype automatic generation of Java Applets from a constraintbased geometry description. Examples: geometry applets (angles on a chord, similar triangles, angles between parallel lines, two right kites, perpendicular bisectors of a right triangle,
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 Auto Rueda: Multiplication Tables  Jose Manuel del Toro Pérez; del Toro Ediciones
An effective method that fosters selflearning of the multiplication tables.
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 Avances de Investigación en Educación Matemática
The official publication of the Spanish Society for Research in Mathematics Education (SEIEM, Sociedad Española de Investigación Matemática) welcomes contributions in either Spanish or Portuguese. Freely download PDFs of past articles,
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 Averaging Diving Scores  NASA Lewis Learning Technologies Project
Kim received the following scores in the state diving championships: 5.2, 5.6, 4.5, 5.0, and 5.2 What was her average (mean) score? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.
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 The Awari Oracle  John Romein
Play the ancient African "count and capture" strategy board game, related to mancala, and also known as wari, awale, oware, or ayo. Dutch computer scientists from Amsterdam's Vrije Universiteit developed a program that computes the best move and eventual
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 Awesome Library  R. Jerry Adams
Browse or search this carefully reviewed collection of math lesson plans, standards, and other classroom resources, organized by topic and grade level. With support from the Evaluation and Development Institute, the Awesome Library screens thirdparty
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 AwesomeTutors.com
Las Vegasbased oneonone tutoring service, with email, webcam and phone tutoring available for most tutoring subjects. Prepayment required.
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 Axiom (Encarta Encyclopedia 2000)  Robert M. Baird; Microsoft Encarta Online
Axiom, in logic and mathematics, a basic principle that is assumed to be true without proof. The use of axioms in mathematics stems from the ancient Greeks, most probably during the 5th century BC, and represents the beginnings of pure mathematics as
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 The Aztec Calendar  René Voorburg
Historical information and illustrations of the two more or less independent systems comprising the Aztec calendar, one having 365 days and based on the agricultural or solar year, the other with 260 days. A Calculator allows you to enter a date in the
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 Babylonian and Egyptian Mathematics  MacTutor Math History Archives
Linked essay describing the character and accomplishments of these two early mathematical systems, with references and other related web sites.
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 Babylonian numerals  MacTutor Math History Archives
Linked essay exploring the development of the Babylonians' number system, with ideas inherited from the Sumerians and the Akkadians. From them came base 60, or the sexagesimal system, but neither the Sumerian nor the Akkadian system was a positional system
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 Backpack Project  Germantown Academy
Spurred by an orthopedic surgeon's report recommending how much weight a person should carry, teams of fifth and twelfth graders examined student backpack weights in relation to body weights in all three divisions of their school, weighing over 800 students
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 The Bad Maths Pool  Danny Nicholson
A UK teacher trainer's Flickr photo group "for all those images of crazy special offers and examples of things that just don't add up." Pictures, which date back to August, 2010, primarily consist of retail advertisements gone wrong with bulk discounting,
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