 Algebra (Seeing is Believing)  De Silva, D'Andreti; ThinkQuest 1997
An algebra tutorial, comprising: mathematical numbers; real number system; numerical representations in algebra (algebraic expressions); algebraic techniques (factoring); quadratic equations and inequalities; graphing (coordinate systems, conic sections,
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 Autograph (Mathematics)  Eastmond Publishing Ltd
Autograph is visualization software that operates in two modes: graphs, coordinates and bivariate data; and singlevariable statistics and probability. Resources include graphs, statistics, screencam demos, Microsoft Word worksheets, PowerPoint presentations,
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 Calc3D  Andreas Greuer
Calc 3D is a free program for calculating 3dimensional vectors, matrices and
complex numbers with Windows 95/98/NT. Cartesian coordinates, spherical coordinates und cylindrical coordinates can be transformed into each other.
Distances, intersections,
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 Center for Technology and Teacher Education  Curry School of Education, University of Virginia
An interdisciplinary group that develops materials to prepare teachers to use technology to enhance and extend students' learning of mathematics. This site offers activities using graphing calculators, The Geometer's Sketchpad, Microsoft Excel, the ExploreMath.com
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 Chameleon Graphing: Plane History  Ursula Whitcher
A Web unit for middle and high school students. Sam the Chameleon investigates the history of the coordinate plane. Was it invented? Who named it? The unit includes a glossary and brief biographical information about the historical figures involved. See
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 Chameleon Graphing: The Coordinate Plane  Ursula Whitcher
A Web unit that introduces the coordinate plane, for elementary and middle school students. With the help of Sam the Chameleon, learn to find points on a number line and graph points in the coordinate plane. See also Whitcher's companion units on Lines
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 Complex Numbers & Trig  Alan Selby
Complex Numbers and the Distributive Law for Complex Numbers, offering a short way to reach and explain trigonometry, the Pythagorean theorem, trig formulas for dot and crossproducts, the cosine law, and a converse to the Pythagorean theorem. A geometric
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 The Conic Sections in Polar Coordinates  David Arnold; Mathematics Dept., College of the Redwoods, CA
An interactive study of the polar form of the equation for a conic section, for readers familiar with polar coordinates and triangle trigonometry. This activity is also a vehicle for the introduction of the Geometer's Sketchpad, though no prior experience
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 Coordinates and similar figures  Mark Motyka, Math League Multimedia
Definitions and illustrations: What is a coordinate?; Similar figures; Congruent figures; Rotation; Reflection; Folding; Symmetric figure.
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 DLK MathsWork Software
Selfdifferentiating, topicspecific math software for Windows 3.1 and above, on number, shape and space, and data handling. All of the practice modules have on screen monitoring at three levels. Six problem modules designed to improve users' application
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 Elementary Thoughts: A Collection of Gail's Responses  Gail Englert
A collection of Gail Englert's responses to questions from elementary and middle school teachers, parents, and students, in the Teacher2Teacher service. Covers a wide range of elementary mathematics topics, as well as teaching points.
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 ExploreMath.com  Third Millennium Press
Shockwave activities illustrating realtime correlations between equations and graphs to help students visualize and experiment with concepts from elementary algebra through precalculus: experiment with the graphs of functions, systems, and complex numbers.
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 Future School
Developer of educational software, online tutoring, and home schooling courses. Video tutorials. Sample lessons and ordering information available.
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 Gadgets  Jan Gombert
Gombert's five "gadgets" provide simple challenges that combine addition, multiplication, and two or threedimensional geometry. Balancing Act shows three values on a beam to balance by addition. Make a given perimeter or area by resizing the figure
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 GEOLAB WWW Server  NASA Langley Research Center GEOmetry LABoratory
Home surface modeling and grid generation. In engineering analysis, a critical component of the numerical solution process is the development of a discrete representation for the physical domain of interest. This discretization into surface and volume
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 Geometry and the Geoboard (SMILE)  Jacqueline Darling, Simmye Anderson Community Academy
A 6th grade lesson designed to teach students to use geoboards: visualizing the concepts of squares, rectangles, triangles and polygons; exploring line segments, areas, and perimeters; demonstrating the phenomenological approach in learning geometry;
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 Geometry in Motion  Daniel Scher
Direct interaction with geometric diagrams, courtesy of JavaSketchpad. The contents include a variety of curvedrawing devices (Intersecting Circles, Falling Ladder, Van Schooten's Parabola, and more); also other activities such as Constant Perimeter
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 Geometry (Seeing is Believing)  De Silva, D'Andreti; ThinkQuest 1997
A geometry tutorial, comprising: the basic building blocks of geometry; segments and rays; angles; parallel lines; triangles; polygons; right triangles (Pythagorean theorem); geometric inequalities; ratios, proportions and similarities; trigonometry;
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 Getting the Goods on Graphing (SMILE)  Velma Elois Rouse, DeWitt Clinton School
A lesson designed to teach students to identify and graph ordered pairs in the coordinate plane; write the coordinates of points shown on a plane; and create designs or pictures using ordered pairs. From the Graphs and Visuals section of a collection
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 Graphing Game (SMILE)  Thomas Lalagos, Hyde Park Career Academy
A lesson that introduces the graphing of ordered pairs on the cartesian plane. From the Recreational and Creative Math section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement.
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 GraphSight  CradleFields.com
A graphing tool to plot and interactively explore 2D math functions in the coordinate plane. Drag, click, and move graphed objects. The site offers a gallery of mathrelated graphics and help documentation. Download a trial version of GraphSight, or purchase
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 Grazing Animals  Math Forum, a Classic Problem from the Ask Dr. Math FAQ
A cow/goat/donkey is tethered to a barn in or a fence around a field... how long should the rope be so that she can eat half the grass?
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 Integer: TicTacToe Four In A Row! (SMILE)  Conchita A. Little, Terrell School
A lesson that employs a phenomenological approach to the introduction of integers using a coordinate plane and ordered pairs. From the Recreational and Creative Math section of a collection of almost 200 single concept lessons by the Science and Mathematics
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 Interactive Mathematics Miscellany and Puzzles  Alexander Bogomolny
"The peculiar beauty of Mathematics lies in deduction, in the dependency of one fact upon another. The less expected a dependency is, the simpler the facts on which the deduction is based  the more beautiful is the result." This awardwinning site offers
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 Introduction to Curve Stitching: Line Designs (SMILE)  Wilhelm L. Lilly, Kenwood Academy
A lesson designed to develop students' awareness that straight line segments can produce the illusion of a curve, and their ability to recognize and describe number patterns; and to help them experience the beauty of mathematics by introducing geometric
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 An Investigation using Parametric Equations  Jim Wilson; Dept. of Mathematics Education, Univ. of Georgia
A paper examining the movement of triangles when one vertex is moved along the xaxis and another is moved along the yaxis. The movement of the third vertex is traced.
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 Learning Games Lab  New Mexico State University Board of Regents
Designers of educational games such as MathSnacks, Ratio Rumble, Gate, Game Over Gopher, Monster School Bus, and several on food preparation, water conservation, kitchen safety, and health science.
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 Locating Points Using Cartesian Coordinates (SMILE)  Mercedes Rodriguez, Clemente Community Academy High School
A lesson designed to teach students to give the coordinates of a point; to plot a point given its coordinates; and to use the coordinate system in locating places on the map. From the Graphs and Visuals section of a collection of almost 200 single concept
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 Main Index of Software Libraries  Netlib, UTK and ORNL
Mathematical and statistical software to download.
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 Mandelbrot Midlevels Competition
A mathematics competition that emphasizes problemsolving, geared towards students in seventh and eighth grade. Three rounds are distributed to schools throughout the year; students may participate in individual or team portions of the contest. Site
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 Math Alive  Ingrid Daubechies, Princeton University
Materials from a course designed for those who have not had college mathematics but would like to understand some of the mathematical concepts behind important modern applications. Interactive "virtual labs" address cryptography; error correction and
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 MathByMandy.com  Mandy Bellm
Bellm's soft cover workbook Coordinate Graph Art for Grades 68 contains reproducible worksheets, fullpage keys following each puzzle, and instructional sections. The Waconia, MN, 7th grade prealgebra teacher blogs about technology in the classroom,
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 Math  Donna Young
Manipulatives, graph paper, and worksheets to print and reproduce for home or classroom use: coordinate grids, clocks for math, charts for math, triangular math facts cards, play money, math drill sheets, fraction manipulatives, unit multipliers, and
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 Math Dork Interactive Math
Animated algebra tutorials, online quizzes, and games. Animations require Flash 3. Full access to this site involves a monthly fee; free lessons include graphing points in the coordinate plane and "The Golden Rule of Algebra."
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 Mathematics of Cartography  Cynthia Lanius
A map is a set of points, lines, and areas all defined both by position with reference to a coordinate system and by nonspatial attributes. These pages discuss how maps are used, give examples of different kinds of maps, and cover map history and math
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 Math Games  Hans Software Pvt Ltd.
Free games for review of multiplication facts & prime numbers (Number Cop & Factortris), slopeintercept graphing (Karappan Puchi: Algebra vs. the Cockroaches), and coordinate graphing (Catch the Fly).
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 Math Is Power Math Puzzles  National Action Council for Minorities in Engineering (NACME)
Six Shockwave games. CodeBreaker requires using trial and error to deduce the correct string of colored circles, given feedback on position and quantity. In Space Tag, two players take turns moving on a grid, one of them attempting to occupy the other's
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 The Mathman  Don Cohen
Materials for sale for K12 students, teachers and parents; precalculus. Materials include Get Ready for Calculus (Calculus By and For Young People book, CDROM, worksheet book, videotapes and map) and Changing Shapes with Matrices. Patterns, visualization,
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 MathsDirect  MathsDirect
Free tutorials and exercises in the Alevel maths subjects of algebra, the binomial theorem, coordinate geometry, differentiation, functions, indices, integration, logarithms, numerical methods, probability, series, statistics, and trigonometry. Register
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 maths online  University of Vienna, Austria
A modern mathematics learning site on the Web: details of the project, persons and institutions participating, or project proposals (only in German). The Gallery consists of interactive multimedia learning units (Java applets), each of which includes
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 Miscellaneous Sketches: Linear Sketch, MidRhombus...  Key Curriculum Press
Sketches: a dynamic display of the equation of a line as you move it around; an illustration of the midpoint figure of a quadrilateral; a tessellation made in the pattern of a Navajo rug; a sketch that draws the regular polygon with given internal angle;
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 Mission Challenge  University of Maryland Ball Aerospace & Technologies Corp.
"After a voyage of 173 days and 431 million kilometers (268 million miles), NASA's Deep Impact spacecraft will get upclose and personal with comet Tempel 1 on July 4, 2005. The first of its kind, hyperspeed impact between spaceborne iceberg and copperfortified
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 Netlib Repository at UTK and ORNL  AT&T Bell Labs, Univ. of Tennessee, Oak Ridge National Laboratory
The Netlib repository contains freely available mathematical and statistical software, documents, and databases of interest to the numerical, scientific computing, and other communities. The repository is maintained by AT&T Bell Laboratories, the
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 Perspective Drawing  Jan Garner
An examination of geometry in art: exercises in drawing, pictures and paintings in perspective on the Web (Albrecht Dürer, the Ancient City of Athens exhibit).
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 The Problem Site  Douglas Twitchell
Math puzzles, brainteasers, strategy games, web quizzes, and informational pages. Flashpowered math games include Adders, Zap (slide tiles to move digits and add up to a specified sum), Side By Side (number rearrangement), One To Ten (given four numbers,
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 Rich Starting Points for ALevel Core Mathematics  Jonny Griffiths
Download PDF task files of 40 openended investigative activities for the A Level Pure Mathematics classroom: basic algebra, coordinate geometry, polynomials, curve sketching, uncertainty and inequalities, indices and surds, sequences and series, differentiation,
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 Rockin' the Standards
Musical recordings by a rock band led by a veteran elementary school teacher who takes the lyrics from common tunes and changes them to help kids remember what they've been taught in school. Each of the fourteen songs on the album "Rockin' the Standards
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 Ron Blond  Ron Blond
Circle geometry applets to explore inscribed and central angles, tangents and radii, and tangents and inscribed angles. Also, applets illustrating the quadratic function (completed square and the discriminant), transformations of the sine and cosine functions,
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 Shelley Walsh
Syllabi and notes for math courses from arithmetic review to beginning calculus. Download MathHelp a tutorial program with problem sets for Mac or PC, or learn how to use MathHelp to create your own tutorials. Brief Mathematics Articles present concepts
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 SketchAndCalc™
On interactive graph paper, sketch straight lines by clicking the pencil icon — or curved ones by selecting the fountain pen nib — then login to calculate the area and perimeter of the shapes constructed. The gear icon in the upperright corner
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