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Here's our collection of useful web sites!
Disclaimer: MathNerds is not responsible for the content of sites other than our own. We believe the sites mentioned here contain reliable information, but you should use your own judgment. Don't believe everything you read, especially on the Internet!
Our Photo Gallery includes pictures from recent MathNerds activities!
The MathNerds Mentoring Network is an exciting new project for linking school district classes to university classes to support local school districts and better prepare future teachers.
Mathematics Mentoring Network info Explains how to join the project and establish a mentoring network at your school or college.
MathNerds Receives Funding for Texas-based Mathematics Mentoring Networks January 22, 2007 press release announcing MMN funding from the Meadows Foundation.
These are the web sites that we refer people to most often; one of them probably already had the explanation you are looking for.
Purplemath Covers all aspects of high-school algebra in detail. Fractions, number bases, polynomials, matrices, solving, tips on word problems.
Dr. Math FAQ Answers nearly all Frequently Asked Questions in math. Some examples include: compound interest, names of big numbers, names of polygons, how to get started on a word problem, how to organize a two-column geometry proof, a vast table of geometric formulas (areas, volumes, etc.), N to the zeroth power, division by zero, why negative times negative is positive, and why study math.
MathWorld An online math encyclopedia, it answers nearly any question that asks "What is ...?"
Math Forum A great site for teachers. It includes lesson plans, activities, science fair projects, discussions of teaching methods and Problem of the Week.
Cut The Knot! A more advanced site that shows how to solve many classic and challenging problems. Things you will find here : 38 proofs of the Pythagorean Theorem (including President Garfield's), the 12 coins (or 12 bags of gold) problem, constructions with ruler and straightedge (and why some angles cannot be trisected).
Maybe your question has already been answered! Check out these archives of answered questions.
The MathNerds own archives Contains all the questions that have been answered by the MathNerds. Often the same question gets asked several times; see if your question is already answered in the archives!
Cardano's formula for the cubic One of our most popular requests: what's the formula for the roots of a cubic equation?
Why is m used for slope? Another popular request: why do we use the letter "m" for the slope of a straight line?
Ask Dr. Math A very large archive and good search engine. The Dr. Math FAQs are especially good.
Cut The Knot! This site focuses on problem-solving techniques, and includes solutions to a number of intricate problems.
GoMath Q-Bank is a fairly small archive, no search engine. Concentrates on K-12 math. This site also has message boards.
MathPages About 500 articles in all areas of mathematics, covering intermediate and advanced topics.
MadSciNetwork A help site for all kinds of science questions except mathematics; includes FAQ and searchable archive. Find answers to your Physics and Computer Science questions here!
Nick's Mathematical Puzzles A site with many interesting and challenging mathematical problems. Each entry has hint, answer, and complete solution.
Automated Answering, Online Calculators
All the MathNerds are human, but there are some clever computers out there that can work (some) math problems too, and give you an instant answer.
QuickMath An automated service that uses Mathematica to give immediate answers to various kinds of algebraic and symbolic problems.
Yahoo! financial calculator links There are an enormous number of financial calculators online (for example, mortgage, amortization). Go to Yahoo! and search for the desired kind of calculator, for example, mortgage calculator.
MathServ - Mathematica Web Server Site that uses an online version of the Mathematica program to do various symbolic and numeric calculations.
WebMath Automated answers in many categories up through calculus. Includes compound interest. Interesting site because the automated answer not only gives you the answer but shows step by step how to get it.
Cryptarithmetic Puzzle Solver Cryptarithms are puzzles like SEND + MORE = MONEY where each letter stands for a single digit and you are asked to find the meaning of each letter. This site solves addition cryptarithms for you.
All Kinds A collection of on-line calculators for every purpose: scientific uses, currency conversion, time, unit conversion, and lots more!
Derivatives Anyone?An automated site that helps you with long multiplication,long division, and derivatives. Integrals coming soon!
WWW Interactive Mathematics Server at Cochise College, Arizona A variety of online calculators and plotters; includes prime factorization, equation solving, matrices, limits, integrals, and more!
Distribution/Density Calculators, Plotters and Random Number Generators Especially handy when the values you need are outside the range of your tables.
Financial Calculators, including a College Savings Calculator Handy to show to your folks to see if they are saving enough to send you to college!
MathWorld Online math encyclopedia. An excellent resource for looking up words and concepts; often goes into a great deal of detail on the math involved. Try this one first!
On-line Glossary of Technical Notation There are thousands of math symbols, and most of them are not standardized, but this site gives the more commonly-used ones.
AltaVista search engine Mathematics is very well represented on the Web, and often you can find definitions and explanations simply by searching with a general-purpose search engine like AltaVista.
Google search engine Another good general-purpose search engine.
Mathematical Atlas Extensive descriptions of all areas of mathematics, indexed in several ways including by the Mathematical Subject Classification (MSC) used by Mathematical Reviews and Zentralblatt für Mathematik.
Wikipedia A collaborative online encyclopedia, it has very good coverage of mathematics topics (and much else).
MacTutor History of Mathematics Especially strong on biographies.
Black Mathematicians This is part of the wide-ranging "Mathematicians of the African Diaspora" site. It includes about 400 biographies.
Chicano and Native American Mathematicians Short biographies of mathematicians and scientists, aimed at K-12 level students.
Women Mathematicians Biographies of women mathematicians, written by students at Agnes Scott College. Includes many contemporary mathematicians.
Paul's Online Math Notes Complete class notes from Paul Dawkins, a math professor at Lamar University.
571 Books! A collection of over 571 textbooks that are all public domain in English, French, and German.
Texas-style Theorem Sequences An online book of inquiry-based materials in the tradition of R. L. Moore
Technical Tutoring Algebra, Trig, Calculus, and More
Digitized Math Books (Grenoble) Search engine (in French) for online digitized math books at many sites.
Digitized Math Books (Göttingen) Many digitized math books and math journals.
MathGV Free function graphing program for Windows.
Plotting Software Free downloadable software for differential equations, statistics, geometry (2 and 3-D), plotting, voting methods, network analysis, games, linear algebra and more!
Number Sense Computerized Software for sale that helps with number sense and UIL competition preparation, written (and used for many years) by Larry White, friend of MathNerds.
Discovery/Inquiry-Based Learning
The MathNerds use a method called Discovery or Inquiry-Based Learning, where we try to lead you to discover the answer for yourself. Read more about this method here.
Inquiry-based Learning in Mathematics Ted Mahavier's collection of papers, notes, and funny stories. Includes a draft of a book of theorem sequences for teaching an undergraduate inquiry-based curriculum.
Discovery Learning Project Two sites in one! The Discovery Learning Project tracks various projects that use and encourage the use of discovery methods. The Legacy of R. L. Moore site traces the influence of Robert Lee Moore (1882-1974), a famous proponent and practitioner of discovery methods of teaching.
Personal experiences with discovery learning methods Everyone who teaches by discovery or inquiry-based methods does it a little differently. This page (part of the Legacy of R. L. Moore site) contains about 30 short notes online and references to about 30 more. Teachers give their experiences using these methods and their impressions of their own teachers who used the methods.
Creative Teaching: The Heritage of R. L. Moore A book-length biography and study of R. L. Moore and the "Moore method" of discovery learning. Originally published as a print book by the University of Houston in 1972, now available online in several digital formats.
R. L. Moore: Mathematician & Teacher (Amazon.com listing) A new (2004) biography of R. L. Moore, by John Parker.
SOS Math Lots of good explanations, examples, and drills. Especially good on fractions and polynomials. Covers algebra, trigonometry, calculus, and several advanced math areas.
Math.com Algebra Worksheets Generates worksheets with algebra problems. (No answers though, so you'll have to check your work yourself.)
A+ Math Mostly arithmetic. Has flashcards, games, worksheets.
FreeMathHelp.com The name says it all; help in various categories including flashcards, worksheets, mini-lectures, and more.
MathStories.com Hundreds of story problems with answers. Elementary school level. This site is not free, it requires a subscription.
Complex, Technology Based Problems in Calculus These problems have a higher level of complexity than traditional text book problems and foster use of a computer algebra system. Each problem set includes discussions of related teaching issues and solutions worked in Mathematica.
Multiflyer A nice site that uses a game to teach basic multiplication.
Aunty Math Challenging problems for K-5 students; a new problem every two weeks.
Math Forum Problem of the Week New problems each week in many categories, aimed at grades 3 - 12.
For true reference resources, universities often have excellent information.
University of Pennsylvania Library Mathematics Resources general archive of a few math links.
University of Tennessee Lots of great links!
Shortcuts to Physics, Engineering, and Mathematics Departments
(Also see Discovery/Inquiry Learning above).
Math Forum A very large site with lots of good information for teachers (also useful for parents). Lesson plans. Internet resources. Problem of the week.
Mudd Math Fun Facts A collection of over 100 fascinating math tidbits that lead into broader areas of mathematics.
Merlot A site with links to an assortment of sites, including mathematical sites. Includes a reviewing system so you can see if other people liked the sites before you go.
Learning Disabilities Online - Math Skills A collection of articles on math learning disabilities.
Dyscalculia.org Dyscalculia is another name for math learning disabilities. This site has a variety of resources, including diagnosis methods and ideas for treatment.
NCTM Illuminations Project Several hundred classroom projects for grades K-12, tied to the NCTM (National Council of Teachers of Mathematics) standards.
CRAFTY and Curriculum Foundations CF is a project to find out from other disciplines what they expect their students to be taught in math. This site contains all the reports, by discipline.
Single-purpose sites and specialized references.
On-Line Encyclopedia of Integer Sequences Search engine and database of sequences; tell it your sequence and it will attempt to identify it.
Tablas Mathemáticas de David Explicaciones y diccionario en español.
MathDork Interactive math lessons with multimedia razzle-dazzle. Has some free samples, but most of the material requires you to subscribe and pay by the month.
Search MAA journals via Harvey Mudd Search Site Index and abstracts for Mathematics Magazine and College Mathematics Journal.
Jen's Stem-and-Leaf Plot Instructions and Jen's Box-and-Whisker Plot Instructions and Jen's Line Plot Instructions Simple, clear instructions on how to draw these statistical charts.
Statistics at Square One An online statistics textbook; includes data display (including all kinds of statistical charts), descriptive statistics, hypothesis testing, correlation and regression, study design. Emphasizes biomedical applications.
Purplemath Covers all aspects of high-school algebra in detail.
MIT OpenCourseWare Massachusetts Institute of Technology is gradually placing all their course materials online.
Metric System Unit Conversions (see the links at the bottom left of this Dr. Math page) All about the metric system and how to convert units.
Geometric Formulas Dr. Math lists all kinds of formulas for two- and three-dimensional figures: area, perimeter, volume, much more.
Print Free Graph Paper Many styles of free, printable graph paper perfect for homework, tests, sketches, craft projects and more.
How to Type Math on a Computer A thorough description of the conventions to use when typing math.
MathBits Devoted to offering free teacher/student worksheets, including stuff on Geometer's Sketchpad, Math and the Movies, Graphing Calculator, algebra and geometry.
Mudd Math Fun Facts Fun Mathematics Problems from Harvey Mudd College. Ask for a random Fun Fact and see if you can answer it without peeking!
The Mathematics Quotation Server Consists of a large collection of information on both contemporary and past mathematicians (and some non-mathematicians).
ZomeTool Really cool mathematical building toys - think mathematical Legos.
Slashdot: News for Nerds. Stuff that Matters. Covers everything that's not in the mainstream. Includes obligatory black page backgrounds.
Geek Code How to communicate your geek credentials to other geeks.
The Bill Gates Net Worth Page Bill has more money than most countries in the world, and other comparisons.
Geek Culture Lots of fun: software gizmos, comics, forums, even merchandise.
Other Online Educational Services
ScienceNerds.com Sells educational science kits for fossils, electronics, astronomy, and more.
Homeworkhelp.com The name says it all.
SmartThinking On-line paid tutoring.
Hotmath Hotmath Displays tutorial (step-by-step) explanations to actual homework problems in over 100 math textbooks used in middle school, high school, and college. Odd-numbered problems only. This is not a free site.
Focused on grades 1 - 8, this site sells lessons to
improve mathematical skills.