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  1. Connecting Geometry - Cathleen V. Sanders
    A fully credited high school distance learning geometry course offered via the Internet to students throughout the Hawaiian islands as part of a grant-funded pilot project through the Hawaii Department of Education. During this E-School (electronic school) course Cathi Sanders, a teacher at Punahou School in Honolulu, and her students communicate through a Web page and via e-mail. Chapters include: 1. Communicating in Geometry; 2. Symmetry and Transformations; 3. Theorems in Geometry; 4. Congruent Triangles; 5. Triangle Properties; 6. Right Triangles; 7. Parallel Lines and Planes; 8. Polygons; 9. Similar Triangles; 10. Circles; 11. Perimeter and Area; 12. Surface Areas and Volumes. more>>

  2. Euclid's Elements - David Joyce; Dept. of Mathematics & Computer Science, Clark University
    A version of Euclid's Elements created by David Joyce to rekindle an interest in the Elements and to show how java applets can be used to illustrate geometry and to bring the Elements alive. The text of all 13 Books is complete. Joyce writes: "...deductive logic is learned almost exclusively in geometry... Modern mathematics and science use deductive logic as a primary tool of understanding. In mathematics, especially, nothing is considered to be known until it is proved." more>>

  3. EUKLID - Roland Mechling
    Dynamic geometry shareware in German and English. Create geometrical constructions on the screen just as on paper; then take a point in your drawing and drag it to another place, and the geometrical relations between all of the objects will be preserved. more>>

  4. Geometry Problem of the Week - Annie Fetter, the Math Forum
    The Geometry Problem of the Week (PoW) is a regular feature of the Math Forum, providing students an opportunity to answer questions and receive feedback and recognition from Forum staff. A Teacher Support page is available for some problems. more>>

  5. K-12 Geometry - Math Forum
    Links to some of the best Internet resources for geometry: classroom materials, software, interactive materials, Internet projects, and public forums for discussion. more>>

  6. Planar Geometry (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine
    An extensive annotated list of links to material on planar geometry. more>>

  All Sites - 1239 items found, showing 1 to 50

  1. 1-1tutor - Synergy Education International Pvt. Ltd
    This online tutoring service engages students with VoIP communication and an interactive whiteboard. 1-1tutor also offers "overnite solution" homework help; certification programs for pre-primary and primary teachers; school adoption programs; and more. ...more>>

  2. 17GoldenFish - Nathaniel Highstein
    Blog by a high school math teacher and college art teacher. Posts, which date back to April, 2013, have included "Math, Art Education, and Risk-Taking," "Triangle Centers and Student Empowerment," "'First Past The Post' And The Dreaded Disease 'Z,'" "Mountain ...more>>

  3. 2 Pi Productions - Jake Scott
    Instructional math rap includes the original songs "Triangle Experts," "Special Right Triangles," "Graphing Trig Functions," "Quadratic Formula," and "The Best Pythagorean Rap Ever." Lyrics include "The cosine is sine with a phase shift of pi/If you think ...more>>

  4. 3Blue1Brown - Grant Sanderson
    Video explanations that elucidate with computer animations, changes in perspective, humor, and — occasionally — rhyming voice-over: Euler's formula, circle division (disjoint regions obtained by joining n points around a circle), and complex ...more>>

  5. 3-D Drawing and Geometry - Cathi Sanders
    A Math Forum Summer 1998 Institute project that uses examples of paintings, architecture, etc. to analyze different types of 3-D drawings, and teaches students how to create them. Careers in 3-D drawing that use these techniques, from architecture to ...more>>

  6. 3D-XplorMath - Richard Palais
    3D-XplorMath creates visualizations of mathematical objects and processes. This tool has built-in algorithms for displaying mathematical objects such as plane curves, space curves, surfaces, conformal maps, polyhedra, ordinary and partial differential ...more>>

  7. 9th Grade Math Proficiency Test - NASA Lewis Learning Technologies Project
    9th Grade Math Practice Questions to test addition, multiplication, word-problem skills, and basic algebraic skills. Includes answers and explanations. From the Proficiency Building Activities of the NASA Lewis Research Center K-12 Program. ...more>>

  8. Abak-Bot
    Online calculators for determining an arbitrary number of the Fibonacci sequence; solving Diophantine equations; calculating the roots of a cubic complex equation; finding the area of intersection of the circles on the plane; calculating the shortest ...more>>

  9. About Proofs - Math Forum, Ask Dr. Math FAQ
    What is a proof? How do you write a two-column proof? ...more>>

  10. ABsurd MAth: Pre-algebra from another dimension - Michael Cain; HRM Video; LearningWave Communications
    An interactive problem-solving game series where the ultimate power consists of mathematical skill and knowledge. Many pages have hidden clues and areas; when players need help, they may email the staff for assistance. Teachers and parents may request ...more>>

  11. Achievement Technologies
    Educational software for learning math at all levels - primary education; GED; community college; adult basic education; correctional, vocational, and special education; mainstream instruction; or home schooling. K-12 lessons are aligned to the NCTM Standards. ...more>>

  12. Activity Resources - Activity Resources Inc.
    Created by Mary Laycock for mathematics teachers, with the goal of providing a real understanding of mathematics through hands-on (manipulative) activities. Purchase books and manipulatives on arithmetic, base ten, red and blue blocks, Cuisenaire rods, ...more>>

  13. Adventitious Geometry - Tony Davie; School of Mathematical and Computational Sciences, Univ. of St Andrews, Scotland
    A brief illustrated page about a seemingly simple problem involving an isosceles triangle with some angles given. Under what circumstances are all the angles in the diagram rational multiples of pi? Further discussion of adventitious quadrangles and concurrent ...more>>

  14. Aha!Math - Learning.com
    This K-5 curriculum package, aligned to state and Common Core standards, supports differentiated instruction with multiple instructional models. Aha!Math provides students with immediate feedback in interactive story settings. Freely sample games and ...more>>

  15. algebra4kids.com - Math Resources Providers
    Worksheets, quizzes, games, and video tutorials for independent learning based on the Montessori theory ("freedom within boundaries"): whole numbers; number factors; proportion and percents; operations on decimals; exponents; fractions; lines, shapes ...more>>

  16. Algebrainiac - Jessica Bogie
    Blog by a Chicagoland middle school geometry and history teacher with more than a decade of experience teaching algebra and pre-algebra. Posts, which date back to August, 2012, have included "#MSSunFun: Teaching Students How to Study for Assessments," ...more>>

  17. Algebra in Simplest Terms - Annenberg Media
    In this video series for college and high school classrooms and adult learners, host Sol Garfunkel explains how algebra is used for solving real-world problems. Free sign up is required for first-time users of the online videos. Materials (videos and ...more>>

  18. AlgebraLAB: Making Math and Science Connections - Mainland High School (Daytona Beach, FL), Georgia Southern University
    Created by mathematics and science teachers, AlgebraLAB is designed to focus on topics and skills from high school mathematics that students must be able to draw upon in their introductory college science courses. AlgebraLAB focuses on lessons and practice ...more>>

  19. Algebra's Friend - Beth Ferguson
    High school math teaching experiences blogged by Ferguson, who for decades has served as a classroom teacher, a district consultant, a school principal, and an online university instructor in curriculum, instruction, and gifted education. Posts, which ...more>>

  20. Alive Maths/Maths à Vivre - Nathalie Sinclair
    Hands-on, 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 ...more>>

  21. 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. ...more>>

  22. 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. ...more>>

  23. 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 ...more>>

  24. 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" ...more>>

  25. AMATH - AMATH Systems, Inc.
    Software for Building and Reinforcing Foundation Mathematics. AMATH is a simple, self-paced, self grading, computer-aided workbook created to combat the math literacy problem in the U.S. It covers 103 modules of foundation mathematics including: arithmetic, ...more>>

  26. Amlon Tutors
    Private tutoring service based in New York City, covering the NJ-NY-CT area. Math topics covered include: Elementary, Algebra, Geometry, Trigonometry, Pre-Calculus, Calculus, Sequential I, II, II, Statistics. ...more>>

  27. Analysis & Knowledge - Sanford Aranoff
    Download data analysis software, such as Patterns, which analyzes and charts trends in stock market using Andrews concepts. See also this former Rutgers University physics professor and current high school educator's thoughts on teaching and help file ...more>>

  28. Analyzing Numeric and Geometric Patterns of Paper Pool (i-Math Investigations) - Illuminations; National Council of Teachers of Mathematics (NCTM)
    An online, interactive, multimedia math investigation. The interactive paper pool game in this i-Math investigation provides an opportunity for students to further develop their understanding of ratio, proportion and least common multiple. Students develop ...more>>

  29. Ancient Mathematics - SunSITE's Vatican Exhibit; Library of Congress
    Math history: math and astronomy in the ancient world. Greek Mathematics, Ptolemy's Geography, Greek Astronomy. Scholarship supported science in this world where faith and science were not yet seen as two irreconcilable cultures. Euclid (Elements, Optics); ...more>>

  30. ... and Math Tutoring - Stuart Raffeld
    This one-on-one tutoring service meets tutees throughout California's West San Fernando Valley, and also tutors online, over-the-phone, and by e-mail. Posts in Stu's blog, which date back to February, 2011, have included "Ten Ways to Improve your SAT ...more>>

  31. Animated Math Glossary - Math Advantage - Harcourt Brace School Publishers
    A K-8 glossary of common mathematical terms, categorized by grade. Each entry has an example, most of which are animated. An "other" section at the end of the alphabet gives tables of metric and customary measurements, time, formulas, and symbols. You ...more>>

  32. Anisohedral Tilings Page - John Berglund
    Tilings and tessellatings with 2-anisohedral and other isohedral tilings. With explanations and a bibliography. Berglund's JavaSketchpad applets include circles in a lattice shape; affine polygons, which extends Napoleon's theorem from a triangle to a ...more>>

  33. Annie's Sketchpad Activities - Annie Fetter
    Handouts for activities that incorporate JavaSketchpad, including: making a presentation sketch; investigating the properties of quadrilaterals; the Euler segment; morphing a simple figure to a circle; Napoleon's theorem; drawing a box and its net; and ...more>>

  34. APlusStudent Online Learning
    Interactive math lessons with graphics, animation, and audio, based on Micromedia Flash technology. Teacher-designed, standards-based lessons. Parents can monitor the progress of their children. There is also homework help and an online gallery where ...more>>

  35. Apples4theteacher.com - Judy Miller
    Free interactive early math learning games in JavaScript. Activities reinforce measurement, telling time, shapes, counting, tangrams, and counting money; and some have a specific holiday theme. Counting in Spanish, Polish, and Gaelic also offered. ...more>>

  36. Aquí Matemàtiques (Catalán) - Carlos Romero
    Web and interactive materials in Catalán designed to facilitate and improve teacher training in mathematics. Goals: to provide curricular incentives for integrating technology into primary and secondary level teaching; facilitate access to curricula; ...more>>

  37. Arbelos Internet Math Society - Bert Liberi and William F. Widulski, Westchester Communtiy College
    A mathematics society dedicated to the pursuit of elegance in problem-solving. Every month, solve challenging problems that require "more imagination than memorization." Also, access old problems and solutions; and study a list of heuristics of problem-solving, ...more>>

  38. arbitrarilyclose - Annie Perkins
    Blog by a secondary math teacher in the Minneapolis Public Schools for whom the phrase arbitrarily close "encapsulates the things I can control, the things I cannot, the impossibility of this craft [of teaching], and the beauty of the exploration despite ...more>>

  39. Archimedes' Book of Lemmas - Alexander Bogomolny
    Archemedes' Book of Lemmas included fifteen propositions. They are listed here, each with its own Java illustration and complete proof. ...more>>

  40. Archimedes - Chris Rorres, Drexel University
    A collection of information on Archimedes' life and achievements, complete with historical quotes, illustrations, and animations. The site covers Archimedes' inventions and accomplishments: Archimedes' Claw, Burning Mirrors, the Golden Crown, the Archimedes ...more>>

  41. Archimedes' Laboratory - Gianni A. Sarcone and Marie J. Waeber
    Archimedes' Laboratory invents, creates, and develops hands-on thinking games which help teach mathematical applications. They also create and manufacture original educational manipulatives and puzzles to support promotional activities. The resources ...more>>

  42. Area and Perimeter (SMILE) - Monica Starks, John Fiske Elementary
    A middle school lesson on measuring and calculating the area and perimeter of squares, rectangles, triangles, etc. From the Geometry and Measurement section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative ...more>>

  43. Area, Arithmetic and Algebra (SMILE) - Larry Freeman, Kenwood Academy
    A lesson designed to show teachers how area of rectangles and squares can motivate the learning of multiplication rules for certain binomials; how students can perform arithmetic based on these identities; and several applications of the "distributive ...more>>

  44. Area Under Curves: The Integral - Don Cohen (The Mathman)
    Area on the geoboard; Plotting points on a computer or programmable calculator to find the area under curves; Finding the area under curves on graph paper. Sample problems with some answers and a program to plot points - from Chapter 13 of Don Cohen's ...more>>

  45. 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. ...more>>

  46. Artlandia Kaleidoscope - Artlandia, Inc.
    A fully interactive program based on and available free with the purchase of the software program Artlandia (requires Mathematica 3.0 or higher; available for all platforms that run Mathematica). It is as easy to use as an ordinary kaleidoscope - create ...more>>

  47. Artlandia - Software for Programmable Creative Graphic Design - Artlandia, Inc.
    A Mathematica-based application for artistic interpretation of data and creating mathematical and algorithmic art. The software provides a selection of tools for constructing geometrical objects from numerical arrays, distributing geometric shapes over ...more>>

  48. The Art of Renaissance Science: Galileo and Perspective - Joseph W. Dauben, McMurry University
    A hypermedia essay devoted to the genius of Galileo and the relation between his role in the Scientific Revolution and the equally remarkable achievements of Renaissance artists reflected, in part, in the discovery and application of mathematical perpective. ...more>>

  49. 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 high-class samurai. The figure shown is a representation from the waist up. The diamond shape is the head and it is possible to ...more>>

  50. 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. ...more>>

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