 Arithmetic  Math Forum
Links to some of the best Internet resources for arithmetic: classroom materials, software, Internet projects, and public forums for discussion.
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 Aritm  Mikael Bonnier
A Java applet for simple mental calculation, drilling on basic arithmetic (addition, subtraction, multiplication, or division, with 1 or 2digit terms), in digits, words, or Roman numerals. It will tell you when your answer is wrong, and how many problems
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 The Arlington Algebra Project  Arlington Central School District
Exercises and homework, organized into twelve units, written by 25 Arlington math teachers from the LaGrangeville (NY) high school and middle schools.
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 Art and Mathematics  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about art and mathematics, such as "Do you know ways that art can be linked to mathematics?"
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 Arte Matemática  TV Cultura
Introducões, entrevistas, e programas sobre geometria, números, simetria, perspectiva, tempo, espaço, ritmo, beleza, ordem, caos, o número de ouro, Pítagoras, e mais. Com biografías curtas de autores e artistas.
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 Articulation in Mathematics Education  EXTEND  Perspectives in Mathematics Education
Links to articles on creating smoother transitions between education and work, between school and college and within sectors of higher education, and about preparing teachers to facilitate these transitions and students to respond to new environments.
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 Art Matrix Fractals  H. Smith, J. Staller
Some basic information about fractals; a fractal gallery; and a twohour video for sale on the subject of fractals and chaotic dynamical systems. What is a fractal?; Product line; Wholesale policy; Introduction to Fractals; etc.
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 The Art of Asking Thought Provoking Questions in the Mathematics Classroom  Carmen Bellido, Uroyoan Walker, Keith Wayland
A position paper in PDF format: a "How To" guide for developing higherlevel conceptual questions that provoke students to think. Several techniques for modifying traditional questions are illustrated with examples ranging from elementary to high school
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 The Art of Fractals  Joseph Trotsky; Artis Fractal Gallery
An online fractal exhibition with images grouped into the themes Paintings, Legends and Fairy Tales, Places, Flowers, Foliage, Trees and Forest, Fauna, Landscapes, Classic, Geometric, Marine, Mystic, and Zodiac.
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 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 Mathematical Proficiency  Alan Schoenfeld
Downloadable Cambridge University Press volume of a 2004 conference held by the Mathematical Sciences Research Institute (MSRI) that brought together a diverse collection of stakeholders in mathematics assessment to examine the goals of assessment and
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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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 At Right Angles  Azim Premji University
Journal of math pedagogy and educational technology published since 2012. Issues come out in March, July, and November, with sections such as "In the classroom" (ITC) and Problem Corner, as well as topical features, book reviews, pullouts, and more.
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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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 Authentic Inquiry Maths  Bruce Ferrington
Blog by an Australian teacher who advocates Tedious Repetitive Activities Involving Number (TRAIN) for the Genuine Application of Mathematical Experience (GAME). Posts, which date back to April, 2012, have included "Top 10 Maths Songs," "Maths and Making
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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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