 Middle School Problem of the Week  Math Forum
A project designed to challenge middle school students with nonroutine problems and to encourage them to verbalize their solutions. From 1996 until 2002, submissions were read and assessed, and comments were returned to the students. The problems are
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 Middle School Problem of the Week  ThinkQuest 1996
A nolongeractive project from Matt Gehrett's Class, Grade 10, Ridgeview High School, Bakersfield, California, USA. A weekly problem at the middle school level, with archives of past problems and answers.
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 Mike's Archive of Riddles and Puzzles (MARP)  Michael Winckler
A puzzle of the week, and an archive of more than 120 puzzles and riddles, with solutions, published in Die FreizeitWoche, a weekly webzine for the AG of Prof. Bock at the IWR in Heidelberg.
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 mikesmathpage  Mike Lawler
Blog by a former math professor "writing about math with my kids." Posts, many with videos of Lawler and his children at a whiteboard, date back to November, 2013: "Day in the life of a home school dad," "Family Math and paper folding," "Fun with James
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 MiLearn High School Course Complements
Curriculumbased high school level math resources in an interactive, "concept, example, application" web design. Courses contain over 500 web pages of stepby step examples and solutions; free demos are available on the site. MiLearn also provides consulting
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 The Millennium Sphere  The Cooper Union
Jean Le Mee, Manuel A. Baez, and a team of their Cooper Union students submitted the Millennium Sphere for an international timecapsule competition sponsored by the New York Times Magazine. Watch a Shockwave animation of Ad Quadratum generation that
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 Milliken Publishing
K12 instructional books and software for home or school use, in several subject areas including math. "Math Sequences" software demo for Windows is available on the web. Software may be purchased on the web, and book dealers are listed by town within
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 MiMa  Museum for Minerals and Mathematics Oberwolfach
This German museum's exhibits about mathematics, which focus on symmetry and crystallography, have included IMAGINARY; SURFER, a realtime ray tracer of algebraic surfaces; Cinderella & Curved Spaces; jReality; Morenaments; Doppelpendel; Penrose Puzzle;
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 Mirror Bounces  Ivars Peterson (MathLand)
In a game of mathematical billiards, one ball moves across the table at a constant speed forever. There's no friction to slow the ball down. It simply travels in a straight line until it hits a cushion and rebounds according to the rule that the angle
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 Mirror, Mirror (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
If you stand between two mirrors that are parallel to each other, one in front of you and one behind, you see countless images of yourself. Light rays bounce back and forth between the mirrors to create that endlessly repeated pattern.
What happens when
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 Miscellaneous (Manipula Math)  International Education Software (IES)
More than 30 miscellaneous Java applets, covering linear transformations of lattices and lines; the area of a parallelogram; inner products; complex numbers; fractals; vectors; life game; line and dot product; hyperbola; parabola; shadow trace; rectangular
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 Miscellaneous: projection, modelling, rendering  Paul Bourke
Projection and displays, data visualization, photography and image manipulation, signal processing, and more.
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 Miscellaneous Sketches: Conics, Pythagorean Theorem...  Key Curriculum Press
Sketches: describing the relationships of parabola, hyperbola, and ellipse from an eccentricity point of view; four ways to demonstrate (manipulate) Pythagorean theorem  shear & rotation, shear & translation, similarity, and tessellation; studying
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 misscalcul8  Elissa Miller
Blog by a high school teacher of algebra and geometry who "expects to be the best teacher that has ever lived, to change the world, and to live wealthy." Posts, which date back to February, 2009, have included "This, My Friend, Is Learning," "7 Country
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 Mister Goodmath's 'Cool' Challenges of the Week  Mike Rooney; Welleby Elementary School, Sunrise, Florida
More than 30 challenge problems, with hints but no solutions. Join "Gator" and pack your bag for an incredible journey through real life challenges. The first problem listed on the menu is always the most current challenge being attacked by Welleby students
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 Mistry Maths  Manoj Mistry
Free and fee PowerPoint UK KS3 and KS4 lessons, planned with OFSTED grading criteria.
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 M.I.T. K12 Math Games Lesson Plans  Wendy Huang, MIT Teacher Ed Program Manager
A collection of math games lesson plans to make learning math fun and engaging for middle and high school students. Written by MIT teacher education students.
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 Monthly Themes  NRICH Maths, Univ. of Cambridge
Past problems from the NRICH Online Maths Club, archived by month. Each problem has a symbol indicating the stage, which tells you how little or how much mathematics you need to know to solve the problem but is no indication of its difficulty. The five
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 Montpelier Portfolio Program (Mathematics)  Montpelier Public Schools
A site that invites students to use creative strategies to solve story questions. Students choose a problem to solve and send in the solution, showing how they found it; assessments of their efforts are returned via email. Questions to help guide students
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 Moogie Math
Windows software designed to prepare students for the Ohio 4th and 9th Grade Mathematics Proficiency Test. Other states can also be accomodated (specifically, Texas, Florida, and Nevada). Downloadable and online demos. Includes ideas for funding resources
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 MooMooMath  Bryon Blankenbecler
Hundreds of instructional whiteboard video primers, examples, and practice problems with step by step solutions. Formerly a public school teacher and tutor, Blankenbecler now teaches online, through a virtual school.
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 More Meaningful Math  Monika Schwarze
An international project to motivate students ages 12 to 16 with problems that show the importance of mathematics in real life and related to other subjects, and to enrich their teachers' methodology. Browse the file archive of freely downloadable documents
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 Morley's Pursuit of Incidence  Cut the Knot!, Alexander Bogomolny
With all the geometric context of his theory (applets are provided for explorations), Morley's method is purely algebraic, founded on the theory of complex numbers. Curves are mappings x = f(t) from the unit circle. x = X + iY, where X and Y are the plane
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 MowMowMow'S Cabri Room
Cabri files for highschoollevel geometry. In English and Japanese.
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 Mozaik Kiadó  András Ringler
Computer animations for teaching mathematics include geometrical solutions of quadratic equations. Also available in Hungarian.
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 M Puzzle: a Math Line Puzzle  Math Forum
Construct nine triangles by drawing three straight lines through a capital M. Questions, hint, solution.
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 mrbartonmaths.com  Craig Barton
A free website for teachers, pupils and parents aimed to get everyone enjoying their maths a bit more. For teachers there are bucket loads of original resources, software tutorials and reviews; for students there are pupilfriendly notes, advice about
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 Mr. Brandenburg's List of Recommended Books on Math and Science  Guy Brandenburg
A list of over 140 math and sciencerelated books, mostly recent, for geometry students to choose from, read, and do a report on. This new list is organized by topic: astronomy; bad science; biography: mathematicians + scientists; biology/life science/evolution;
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 Mr. Hoffman's Home Page  Jim Hoffman
Assignments, notes, exams and interactive vocabulary quizzes (with answer keys) from Hoffman's own math and twodimensional computer animation high school classes. These materials are based on Saskatchewan Provincial Curriculum, and include Math 9, Math
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 Mrs. Glosser's Math Goodies  Gisele Glosser
Interactive math lessons that work online and offline in a Web browser, and provide immediate feedback to students, with in addition Worksheets (on circumference and area; exponents; expressions and equations; integers; Ocean Math; order of operations;
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 MSTE Java  University of Illinois at UrbanaChampaign (UIUC)
Javabased activities submitted to MSTE, the Office for Mathematics, Science & Technology Education at UIUC. Topics include: best fit; box perimeter; Buffon's needle; CAD viewer; cereal box problem; chisquared test analysis of random marbles; cliff
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 Mucho Math  Jake Enfield
Flash program for students to learn math vocabulary and mental math tricks through best practice teaching methods (discovery learning, scaffolding, spiraling, and customized learning). Teachers can create an account and add one student for free to try
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 Mudd Math Fun Facts  Francis E. Su; Mathematics Dept., Harvey Mudd College
A site developed as a resource for professors wishing to enrich their courses with mathematical 'fun facts': more than 100 5minute math tidbits that can be used at the beginning of class to get students interested in mathematics. They are best used in
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 Multiplication and Areas (SMILE)  Albert Michael, Robert Fulton Elementary School
A lesson for grades 35 designed to teach twodigit multiplication using math facts; how to find areas of rectangles and squares using stamps and Lego pieces; and how to fill an order of items of equal and different prices and quantities. From the "Miscellaneous"
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 MultyGraphiX 2D & 3D function plotter  Sergey Petrov, ADC Software
Plot any mathematical 2D and 3D, explicit and parametric functions. Allows users to plot functions in Cartesian, polar, cylindrical, and spherical coordinates. Trial version available for this commercial software. Windows only.
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 Murderous Maths  Kjartan Poskitt et al.
Contents, descriptions of characters, updates, and "extra bits" for the books Murderous Maths; The Essential Arithmetricks; Desperate Measures; Do You Feel Lucky?; Vicious Circles and other Savage Shapes; The Phantom X; The Fiendish Angletron; The GCSE
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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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 Musings from Mrs. Galvan  Regan Galvan
Blog of "thoughts on teaching math and on promoting social, emotional wellness among my students and colleagues" by a selfdescribed fan of students creating digital portfolios in math. Posts, which date back to February, 2013, have included "Geometry
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 My Math Man  Francis (Bud) Leverone
Narrated slides and interactive practice to accompany Glencoe and Chicago textbooks on algebra and geometry topics.
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 MyMaths  Alan Jackson
A feebased repository of lesson plans, including "boosters" specifically for UK Year 9, "Grade D to C," and higherlevel GCSE students. A subscription also provides for MyMaths' class management system. Take a tour of the resources and sample lesson
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 Napoleon's Theorem  Cut the Knot!, Alexander Bogomolny
On the sides of a triangle construct equilateral triangles (outer or inner Napoleon triangles). Napoleon's theorem states that the centers of the three outer Napoleon triangles form another equilateral triangle. The statement also holds for the three
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 NASA Smart Skies FlyBy Math  NASA Airspace Systems: Ames Research Center
DistanceRateTime Problems in Air Traffic Control for Grades 59. Six rich, standardslinked problems, each with student worksheets and teacher guides and related materials. Each features a guided experiment for students to carry out. Worksheets provide
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 National Library of Virtual Manipulatives for Interactive Mathematics (NLVM)  Cannon et al., Principal Investigators; Utah State University
Java applets and other virtual manipulatives cover mathematics appropriate to grades K12, with a special emphasis on K8. Browse by grade band or by math topic: number and operations, algebra, geometry, measurement, and data analysis and probability.
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 Native American Geometry  Chris Hardaker
A physical, proportional geometry that originates from the simple circle. A growing body of architectural and iconographic evidence suggests this geometry was a relatively common tradition and has been practiced for at least 2000 years. The site is divided
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 Navworld  Joseph Portney
A center for the art and science of navigation, providing navigational "cerebrations," famous historical accounts, interviews and biographies. See Earthshapes, different ideas of what the earth would look like if it were one of 12 different shapes (physical
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 NCTM Standards (Standards 2000)  National Council of Teachers of Mathematics (NCTM)
NCTM's Principles and Standards for School Mathematics is the compilation of the lessons learned and experiences gained over the years since the 1989 Standards were released. The site features include: an online version of the Standards (including illustrations,
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 NECTAR Foundation: New Era Classroom, Technology and Research
A nonprofit foundation specialising in the development and marketing of educational software in the kindergarten to grade 12 program with a focus on mathematics software programs. It also develops and markets print, video, and audio materials for students
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 Nesting Software: PLUS (PaneL Utilization Software)
Software for reducing scrap and generating optimum layouts for cutting in sheet metal layout, fabrication, glass, building panel, and woodworking industries. Samples and free demo downloads.
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 Neufeld Learning Systems, Inc.
Mathematics programs designed to facilitate learning in destreamed classes as well as in home study and distance learning. Interactive programs for: algebra, equations, exponents, fractions, geometry, and integers. Understanding exponents and algebra
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 Neutral and NonEuclidean Geometries  David C. Royster; University of North Carolina at Charlotte
Course notes that include: Origins of geometry; spherical geometry; logic and the axiomatic method; proof; Euclid's mathematical system; incidence geometry; betweenness axioms; congruence theorems; axioms of continuity; neutral geometry; theorems of continuity;
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