 Algorithms, Problems, Empirical Studies (APES)  Leeds and Strathclyde Universities, U.K.
An informal group of researchers interested in the understanding of algorithms and problems through empirical studies. Brian Hayes' article Can't Get No Satisfaction, introduces phase transition research in satisfiability, outlining a problem near the
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 Algorithms Project  Institut National de Recherche en Informatique et en Automatique (INRIA)
A small international group of people with interests in design and analysis of algorithms, computer algebra, combinatorial analysis and asymptotics. It aims at general methods in combinatorics and analysis, with which classes of problems can be treated
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 Alice begegnet der 4. Dimension  Stefan Scheller
(Alice encounters the 4th dimension) Einige faszinierende 3DAnimationen hat diese Homepage zu bieten. "Alice begegnet der vierten Dimension" ist hauptsächlich eine umgeschriebene Kurzversion der bekannten skurilen Kindergeschichte aus England. Der
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 Alien Tiles Official Web Page  Pickover and Mckechnie
A difficult puzzle developed by Dr. Cliff Pickover and Cam Mckechnie. (Some have called it Rubik's cube for the new millennium.) The rules are simple, but the patterns soon become very complex. The authors look forward to hearing from artists, puzzle
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 Aligning and Articulating Standards Across the Curriculum (NCREL)  Cathy Cook; Pathways to School Improvement
Critical Issues in Mathematics. Students often do not see any connection between the mathematics they learn in school and the other subjects they study. As a result, many students do not see or understand the connection between mathematics and their daily
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 Alive Books  Sotirios Persidis
The site offers a free downloadable course on Calculus of a Single Variable, as well as a link to a modern new Mathematical Handbook is given. The Handbook is part printed matter and part online, and fully searchable even within mathematical expressions.
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 Alive Maths/Maths à Vivre  Nathalie Sinclair
Handson, interactive "microworlds," in which students investigate patterns and relationships, pose questions, play with the variables, and solve problems: Play with Lulu on a grid; practice triangle reflections; play with fractions and decimal patterns
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 All About Addition (AAA Math)  John Banfill
Interactive math exercises, lessons, and games covering addition facts and
addition of whole numbers, decimals, and fractions.
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 All About Decimals (AAA Math)  John Banfill
Interactive math exercises, lessons, and games to teach naming, adding, subtracting, multiplying, dividing, and converting decimals.
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 All About Division (AAA Math)  John Banfill
Interactive math exercises, lessons, and games covering division facts and
division of whole numbers, decimals, and fractions.
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 All About Fractions (AAA Math)  John Banfill
Interactive math exercises, lessons, and games covering identifying, adding,
subtracting, multiplying, dividing, and converting fractions.
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 All About LaTeX2HTML  Nikos Drakos, Computer Based Learning Unit, Univ. of Leeds
LaTeX2HTML: What it is, how it works, where to get it, how to install it, how to use it and how to diagnose and fix problems. Also the LaTeX2HTML manual. Mailing list; sample converted documents; publications about LaTeX2HTML; searchable archives. Last
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 All About Multiplication (AAA Math)  John Banfill
Free, interactive math exercises, lessons, and games teaching multiplication tables, fact and multiplication of whole numbers, decimals, and fractions.
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 All About Percents (AAA Math)  John Banfill
Interactive math exercises, lessons, and games covering finding, converting, and using percents.
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 All About Ratios  Cynthia Lanius
Activities designed to help students understand the concept of ratios, using the Internet. Activities may also be printed out if computer access is not available. Students are expected to: use multiplication and division of whole numbers to solve problems,
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 All About Subtraction (AAA Math)  John Banfill
Free, interactive math exercises, lessons, and games covering beginning subtraction facts and subtraction of whole numbers, decimals, and fractions.
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 AllAmerican Supertutors  Robb Gott
A nontraditional approach to math tutoring. Inperson or online tutoring sessions.
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 All Educational Software: Math Software  Kimball & Wood Enterprises, LLC
Math learning games, math help and software for kindergarten through high school. Educational software to help kids learn addition, subtraction, algebra, geometry, calculus, statistics and more.
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 All Elementary Mathematics  The Mathematical Web High School
 Dr. Yury Berengard
An online Web high mathematical school, featuring all of the curriculum of elementary mathematics. Arithmetic, algebra, geometry, trigonometry, functions and graphs, analysis. Theory and solving problems. Versions of examination tests. Online consulting.
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 All Ivy Tutoring
Phoenixbased tutoring service providing oneonone, inhome tutoring, offering help in all math subjects from basic math through college level differential equations and linear algebra.
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 allmath.com  Arbor Media, Inc.
Math tools (flash cards, a metric converter); games (magic square), and reference pages: biographies, a glossary, the multiplication table, metric conversion factors, and an ask an expert service.
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 All Numbers Are Less Than A Million  Jim Loy
A "proof" that is "very close to what often passes as proof in the nonmathematical world."
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 ALLREALS+BLOG  Marty Romero
Blog about "effective educational reforms/policies and empowering students through equitable pedagogical practices." Posts, which date back to September, 2012, have included "Procedural Knowledge vs. Conceptual Understanding (A Dad's dilemma)"; "Obesity
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 All Star Review
A review site designed to help teachers and parents find out about software, audio, video and other educational products before purchasing them. Search for software and other materials alphabetically, by level, or by subject (see Math Audio and Software.)
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 All Star Tutoring
Professional oneonone tutoring services in New York City's boroughs, including GED test preparation, citywide exams, and Regents exam preparation.
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 All the King's Digits  Terry Trotter
Challenge: Using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9, and the operations of +, , x, ÷, sqrt (square root), cbrt (cube root), ^ (raise to a power), and ! (factorial), along with grouping symbols, write expressions for the counting number 100.
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 All the News That's Fit to Math
Blog of mathematical questions that arise from news headlines. Posted by an Australian teacher since January, 2014, entries have included "The decline of cancer rates in the USA," "The Royal Family's Spending Habits," and "Are Super Bowl ads worth it?"
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 Allwave  Allwave Corp
Software company offering: MathHub® (math tool), PlotHub® (plotting tool), MathCal® (graphical calculator tool, both PC and Pocket PC versions), and MapHub® (map has over 100 projections), as well as a special application for engineering.
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 Almost Looks Like Work  Jason Cole
Blog of Matlab plots, animations, and other explorations by a PhD student "with a passion for physics, maths, and data visualization." Posts, which Cole describe as "lighthearted" and date back to July, 2014, have included "WiFi strife," "Antics," "Damp
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 Alphabet Geometry  Jamie Tubbs, MisterTeacher.com
Learn about geometry by looking at letters. Included are interactive Flash movies on transformations, angles, and similar letters. Movies on parallel and perpendicular lines are planned.
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 Alphametics  Mike Keith
Alphametics (also known as alphametrics) are puzzles that combine mathematical and word play, the first modern example of which was Dudeney's SEND + MORE = MONEY. From the "alphamenu," choose traditional alphametics, the doublytrue genre, new literary
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 Alphametics  Torsten Sillke
Cryptarithms are puzzles in which letters or symbols are substituted for the digits in an arithmetical calculation. If a cryptarithm uses letters in place of digits, and the letters form words or phrases, the puzzle is an alphametic. J. A. H. Hunter coined
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 alt.algebra.help
A newsgroup for asking and answering to algebra questions.
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 alt.algebra.help  Math Forum
An unmoderated newsgroup focused on algebra. Read and search archived messages; and register to post to the discussions.
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 Alta Vista
A major Web search engine, also offering major categories to browse (Automotive; Business & Finance; Computers & Internet; Health & Fitness; Hobbies & Interests; Home & Family; Media & Amusements; People & Chat; Reference &
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 Alternative Assessment Techniques  ERIC
An introductory bibliography of available information on alternative assessment. Provides an extensive list of resources, with abstracts and directions for obtaining fulltext copies of ERIC Journal and ERIC document citations.
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 Alternative Instruction and Alternative, PerformanceBased Assessment  Jane Ehrenfeld; Math Forum
Two annotated bibliographies designed to present ways in which assessment can be altered without drastic restructuring of class and curriculum. Some of the articles and books referenced have links to portfoliobased instruction and assessment, and can
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 Alternative Math Club
Interactive practice with problems typically found in Japan: exams for junior high school math, high school math, and college math; and entrance exams for high shool and for university. Also available in Japanese.
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 Alternative or Block Scheduling  Mathematics Education at The Math Forum
The Math Forum's suggested sites on block scheduling, including Web resources, articles and reports, and discussions.
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 The Altitudes and the Euler Line  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A proof of the existence of the orthocenter of a triangle embodying several concepts such as Morley's complex interpolation theory, Napoleon's theorem, and Morley's miracle; with examples of the theorems and a geometric explanation of the Euler Line and
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 The Altitudes  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A collection of proofs of the concurrency of altitudes in triangles, featuring a Java applet with which one can see the various points, lines, triangles, and circles associated with any given triangle.
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 The Altitude Theorem for Equilateral Triangles  Web Feats Workshop II
Use the applet to intrigue students with a surprising property of equilateral triangles, stimulate their curiosity to wonder why the property is true, then lead them to understand how the property can be proven in an unexpected way. This workshop was
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 alt.math.recreational  Math Forum
An unmoderated newgroup focused on recreational mathematics. Read and search archived messages; and register to post to the discussions.
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 alt.math.undergrad  Math Forum
An unmoderated discussion forum for issues and problems pertaining to college undergraduate mathematics. Read and search archived messages; and register to post to the discussions.
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 Al Zimmermann's Programming Contests  Al Zimmermann
An "arena where demented computer programmers compete for glory and for some cool prizes." Computationally intensive problems, often involving heuristics, have included "Point Packing," "Retaining Water" (based on magic squares), "Son of Darts," "Topswops"
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 Amara's Wavelet Page  Amara Graps
Read a brief overview of wavelets, or listen to sounds compressed using wavelets. Page also includes an extensive list of wavelet resources.
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 A+ Math
A site developed to help elementary school students improve their math skills interactively, offering: educational math games (learn basic operations and geometry by playing MATHO  bingo and math combined; Hidden Picture; and Concentration), Web flash
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 AMATH  AMATH Systems, Inc.
Software for Building and Reinforcing Foundation Mathematics. AMATH is a simple, selfpaced, self grading, computeraided workbook created to combat the math literacy problem in the U.S. It covers 103 modules of foundation mathematics
including: arithmetic,
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 Amazeing Art  Christopher Berg
Free printable mazes of buildings, ships, ancient monuments, and more. The site features historical essays describing some of the mazes of ancient times, together with maze terminology and tips on drawing mazes. There are also maze products for purchase,
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 The Amazing Abacus  ThinkQuest 1996
An exploration of the abacus. Learn to use the abacus and what it is for, and to speak and write Chinese numerals and formulas.
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