 The Maths Faculty  James Harris, University of Leeds
Free podcasted lectures of UK academics speaking on topics from the UK high school curriculum and major exam boards (AQA, Edexcel, and OCR). Created by the University of Leeds with funding from the Higher Education Funding Council of England.
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 MathSource  Wolfram Research
An extensive electronic library of Mathematica material and notebooks, with over 100,000 pages of immediately accessible Mathematica programs, documents, examples, and more. You may browse the archive or search by author, title, keyword, or item number.
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 MathStar  Center for Distance and Online Learning, LA County Office of Education
MathStar seeks to improve the teaching and learning of mathematics in middle schools through the use of interactive technologies. The project addresses these issues systemically, through an intensive collaboration between middle schools, colleges and
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 Math Thinking  David Wees
"Sharing thinking about math from students": a collection of work by students that teachers have not taught them explicitly how to do. Wees elaborates that "the idea or technique a student uses does not itself have to be completely original, just new
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 Math Tools Discrete Math  Math Forum
A community library of software tools for discrete math students and their teachers. Discrete Math is one section in the Math Forum's Math Tools digital library of software for computers, calculators, PDAs, and other handheld devices, with related lesson
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 Math Vids  SchoolVids, LLC
Free educational videos on mathematical topics. Choose the teacher who most fits your learning style. A premium service is available that offers an adfree website, lesson resources, fullscreen videos, and NCTM standards indexing.
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 Mathwords: Terms and Formulas from Algebra I to Calculus  Bruce Simmons
A comprehensive listing of definitions and examples for words used in high school and early college math. The entries are written in a levelappropriate style.
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 MathWorld: Eric Weisstein's World of Mathematics  Eric W. Weisstein and Wolfram Research, Inc.
A fulltext searchable, comprehensive alphabetical encyclopedia of math terms, equations, and derivations, with explanations, examples, references, and much more. Everything from Abacus to Zsigmondy Theorem. (Formerly the CRC Concise Encyclopedia of Mathematics,
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 Matrices Help Relationships  William A. McWorter Jr.
This page uses examples to illustrate the use of matrices in solving problems of relations between variables, and continues with an "airline" problem involving networks, also solvable with matrices. The page is hosted by Alexander Bogomolny's Interactive
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 Maxima: a GPL CAS based on DOEMACSYMA
Free, opensource computer algebra software. Extensive notes for users and programmers, and a bugreporting system, available here.
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 MCS Problem of the Month  California State University, East Bay
Calculus, number theory, probability and other collegelevel problems by Dan Jurca and his colleagues in the CSUEast Bay Math and Computer Science Department. The archive of POMs, with solutions, dates back to 1995.
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 Median  Don Steward
Blog by a maths teacher influenced by Hans Freudenthal. A fan of unicase, Steward teaches 1016 yearolds in Shropshire (UK). His posts, which date back to November, 2007, have included "loooooong multiplication  grid method," "two reversal problems,"
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 MERLOT Mathematics Portal  MERLOT (Multimedia Educational Resource for Learning and Online Teaching)
Free highereducation online teaching materials, and a user community centered around those materials. Free registration allows users to create, contribute, collect, and comment on resources, or become a peer reviewer or guest speaker. The site offers
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 MiddleSchool Math Through Applications Project (MMAP)  Institute for Research on Learning (IRL)
Developers of curriculum materials and software designed to make math relevant, accessible and successful for middleschool students. While working on realworld multidisciplinary design problems, students grapple with mathematics from basic skills to
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 Molecular Information Theory and the Theory of Molecular Machines  Tom Schneider
Introduction to the use of information theory in studying molecular biology. The author is part of the Molecular Information Theory Group, a section of the Laboratory of Computational and Experimental Biology at the National Institutes of Health in Frederick,
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 Monopoly Dollars and Sense  Ivars Peterson (MathLand)
The same rules underlie all of the varied editions of Monopoly, which feature themes ranging from golf to your favorite city. It's possible to describe the game in terms of a mathematical construction called a Markov chain, named for the Russian mathematician
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 Multicultural Math Fair  Suzanne Alejandre, Frisbie Middle School
Twentynine percent of Frisbie's student population is Limited English Proficient; Arabic, Cambodian, Chinese, German, Indonesian, Korean, Philipino, Polish, Portuguese, Romanian, Samoan, Spanish, Taiwanese, Vietnamese, and Urdu are represented. In 199394
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 Musing Mathematically  Nat Banting
Thoughts from a high school mathematics teacher on the teaching of mathematics, and the learning of mathematics. Posts, which date back to May, 2011, have included "Playing with Mean, Median & Mode," "Attaching a 'Why' to the 'How," "The Mathematics
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 Myronn Hlynka's Queuing Theory Page  Dr. Myron Hlynka
Provides general information and links to books, researchers, software,
humour, and applications of queuing theory/ queues/wait times.
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 Nautilus  Nautilus Ventures LLC
An online and print monthly dedicated "to science and its endless connections to our lives." Each issue contains chapters — essays, investigative reports, blogs, fiction writing, games, videos, graphic stories, and other original content —
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 Neil J. A. Sloane
Neil Sloane's research ranges far and wide and includes coding theory, sphere packing, lattices and quadratic forms, packing lines, and planes, spherical codes and designs, quantizing, geometry, combinatorics, the design of experiments, integer sequences,
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 Nim  Doug Ensley, Shippensburg University
Play online: two people play with several piles of stones. On each move a player
removes as many stones as he or she would like, but forms only one pile. The player who takes the last stone wins.
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 (Not) Tiling a Triangle of Dots  Don West, Department of Mathematics, SUNY Plattsburgh
A triangular array of dots can never be tiled by threeinline tiles, and
can be tiled by threeinatriangle tiles only if the size of the array is
congruent to 0, 2, 9, or 11 (mod 12). The author gives an elementary proof of these two results, not
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 NSDL Middle School Portal: Math Pathway  NSDL; the Ohio State University
A middle school portal into NSDL's math resources, browsable by topic, or choose a preselected set of resources on given subjects.
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 Numb3rs Math Activities  Cornell Department of Mathematics
Notes and activities on the mathematics behind each CBS television broadcast of the FBI crime series NUMB3RS, from the pilot episode through season five: Uncertainty Principle, Sniper Zero, Dirty Bomb, Assassin, Toxin, Backscatter, Two Daughters, Burn
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 The Number of Latin Rectangles [PDF]  Peter Doyle
A paper that shows how to generate an expression for the number of kline Latin rectangles for any k. The computational complexity of the resulting expression, as measured by the number of additions and multiplications required to evaluate it, is on the
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 Numberplay  The New York Times
Mathematical, logical and scientific puzzles, with solution "recaps." The posts, by Gary Antonick and Pradeep Mutalik, have included "Surreal Hat Tricks," "The Puzzles of Pickover," "Prime Rib at Hogwarts," "Nim for (a) Change," "Phi  The Magic and the
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 Online Dictionary of Combinatorics  Joe Fields
An online dictionary of combinatorics by a doctoral student at the University of Chicago. The dictionary is navigable by letters of the alphabet, and contains a few illustrations. Entries range from Abelian to Zorn's Lemma, and include several resources
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 OpenMathText.org  David A. Santos, Alain Schremmer
OpenMathText.org is a depository of free, downloadable texts and is primarily dedicated to the specification, development, and dissemination of free, editable and downloadable mathematical texts aimed, mainly, at "just plain folk." OMTo invites registrants
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 Other Maths  Jon Perry
Notes, applets, and proofs on a variety of open problems and conjectures: roots of x^p, highest power of 2 that divides ab + bc + ca, a prime product paradox, consecutive integers, (n + 1)!, Collatz, nsecting a line, the first lower digit, Fibonacci,
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 PAX Puzzle  PAX Puzzle
Wooden puzzles, rope puzzles, puzzles boxes, and board games for sale. Recommendations and gift sets available.
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 PBS Teachers: Math  PBS Teachers
The Public Broadcasting System's Math Service, combining computing and telecommunications technologies to offer interactive data services and interactive video and voice services for education based on the NCTM Standards. The site features: resources,
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 Peanut Software for Windows  Rick Parris
Abstracts and links for downloading free mathematics software: Wingeom (highprecision geometric constructions); Winplot (generalpurpose plotting utility); Winstats (scatter plots, curve fitting, histograms, statistical data, and standard theoretical
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 Peter Ash's Thoughts on Math and Education  Peter Ash
Musings on doing and teaching mathematics, book reviews, and math problems both elementary and advanced from the creator of Cambridge Math Learning. Blog posts, which date back to August of 2007, include "Very Proper Fractions"; "Physical Models for NonEuclidean
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 Peter Doyle  Mathematics, Univ. of California at San Diego
Advanced tutorials, proofs and papers, mostly statistics, probability, geometry, and graph theory, but with examples from other mathematics areas as well. Don't miss Dr. Doyle's Flip Flops.
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 Powell's Books
Located in Portland, Oregon, USA; the largest independent bookseller in the United States, specializing in technical books and new, used, hardtofind, and antiquarian titles. An extensive subject and keyword list is available  search database of titles,
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 Powersums, Fermat, Waring; Quotes, History...  Nico F. Benschop
Links to papers on the ideas of Fermat, Waring, Goldbach, Cantor, Hensel, HasseMinkowski, and Selmer, and the following mathematical concepts: semigroups, sequential logic synthesis, cubic roots, and state machines and their sequential closure. With
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 PreCalculus Problem of the Week  Math Forum
Math problems for students who had finished studying topics commonly covered in firstyear algebra and high school geometry. From 2002 to 2003, problems involved probability, statistics, discrete math, and trigonometry. The goal was to challenge students
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 Principles and Practice of Constraint Programming: Conferences  Department of Computing Science, Univ. of Alberta, B.C.
Links to previous and future conferences concerned with all aspects of computing with constraints including: algorithms, applications, environments, languages, models, systems. Contributions are welcome from any discipline concerned with constraints,
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 Problem of the Week  Elgin Johnston, Department of Mathematics, Iowa State University of Science and Technology
Download PDFs of challenging problems in number theory, abstract algebra, graph theory, and other topics every Monday. Intended for undergraduate students enrolled at Iowa State University: "Solvers of each week's problem will be listed on the Problem
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 Problem of the Week  Pavel Belik, Augsburg College
Weekly challenges, posted for undergraduates at Augsburg College, that run the gamut from number theory to geometry and beyond.
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 Problems in Topological Graph Theory  Dan Archdeacon
An ongoing list of open questions in topological graph theory, to which the author invites contributions. Classical questions on genus; coloring graphs and maps; drawings and crossings; paths, cycles, and matchings; symmetries; locally planar embeddings;
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 Problems of the Week  Math Forum @ Drexel
Our goal with the Problems of the Week is to engage students in nonroutine, constructedresponse mathematics investigations that integrate writing with problem solving in the math classroom. In addition to the Current PoWs and the Problems of the Week
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 Professional Development Programs for Grade K12 Teachers of Mathematics  The State University of New Jersey  Rutgers
Read about and apply for summer institutes such as Institutes for New Teachers of Mathematics and Science, Helping All Students Succeed in Grades 712 Mathematics, the Leadership Program in Discrete Mathematics, and the DIMACS Connect Institute; conferences
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 The Progress Report  Dan Lemay
A web log where the author shares successes, concerns, and commentary about teaching math to high school students.
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 Project Welcome (Web Educator's Library Collection of Mathematical Explorations)  MAA (Mathematical Association of America)
Interactive mathematical programs in a newly developed, Javabased interface.
Download online or offline versions of the player. Twenty lessons, with summaries, include "Best Linear Fit," "Limits of Functions," "Piecewise Functions," "Nonlinear Equations,"
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 Puzzles  Martin Watson
Blogs, comments, musings, design sketches, and photographs of mechanical puzzles by an avid collector and craftsman. Puzzle news, the author's own burrs (Watson's wormhole, digigrams, Dutch cubist), indepth explorations of manipulative puzzles (Puzzles
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 The Puzzle TOAD  Tom Bohman, Oleg Pikhurko, Alan Frieze, and Danny Sleator, School of Computer Science, Carnegie Mellon University
Send the authors your solutions to their challenging graph theory, number theory, geometry, discrete mathematics, logic, and other puzzles. Revisit periodically to see the latest question, and download PDFs of solutions of past problems.
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 Quandaries and Queries (Math Central)  Dept. of Mathematics and Statistics, University of Regina, Saskatchewan, Canada
A math Question and Answer area for K12 students and teachers, with searchable archives of past questions and answers.
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 Query Interface to the Contents of the Mathematics Archives  University of Tennessee, Knoxville (UTK)
Search software, abstracts and reviews; teaching materials, etc. by keyword.
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