 Egres Open  Tamás Király
A wiki forum for open problems in combinatorial optimization: colouring, cycles and paths, edgeconnectivity, integer polyhedra, matchings, matrices with indeterminates, matroids, nodeconnectivity, orientations, packing common bases, rigidity, stable
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 Electronic Emissary  Judi Harris; Univ. of Texas at Austin
An Internetbased interpersonal resource online since February of 1993: a searchable database of experts and a way to request "matches" that helps teachers with access to the Internet locate other Internet accountholders who are experts in different
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 El Niño Unveiled  Marcia Barton, Susan Freeman; Louisiana State University
What is El Niño? This threeday interdisciplinary Webquest for middle grades students combines natural history, math, and writing to introduce activities and research centered around El NiñoSouthern Oscillation (ENSO)  its history, cause,
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 EMail Math  Elizabeth Murphy
Using the Internet for a global exchange of studentwritten math story problems. Grade 4 students participated in an enrichment project entitled Cross Cultural Story Problems in Math from December '94 to May '95. Students received story problems from
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 Encyclopedia of Dynamical Systems  Eugene M. Izhikevich, EditorinChief
Scholarpedia is a free, anonymously peer reviewed encyclopedia whose invited or elected scholars write articles controlled by curators responsible for their contents. Scholarpedia's encyclopedia of dynamical systems features mathematical topics such as
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 Entropia.com
The Global Internet Community for Science and Mathematics Distributed Research Computing, Entropia.com is a community dedicated to performing real research on a massive scale using ordinary home and office computers connected through the Internet. Entropia.org's
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 EnviroNET  Space Environment Information  Messore and Chrissotimos; Goddard Space Flight Center
An online service for the space environment community in support of NASA's engineering and scientific goals, providing models and information on the space environment via the Internet. The EnviroNET programming group is staffed entirely by students who
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 The Erdös Number Project  Jerry Grossman
Paul Erdos wrote hundreds of mathematical research papers in many different areas, many in collaboration with others. His Erdos number is 0. Erdos's coauthors have Erdos number 1. People other than Erdos who have written a joint paper with someone with
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 Everyday Mathematics: A Parent's Handbook K5  Oswego School District
Classroom routines, standards by grade level, examples, glossary, and other resources. Learn about number families, number stories, games such as factor captor, and algorithms such as addition by partialsums, subtraction by countingup, lefttoright,
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 Expected Value: Temperature of a Point on a 2D Plate (MSTE)  Ed Malczewski; University of Illinois at UrbanaChampaign (UIUC)
Find the temperature at a particular point of a rectangular plate using statistical methods. It is assumed that the temperature of the edges as well as the dimensions of the plate are known. The lesson includes a program that will run on Resampling Stats,
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 Exploring Abstract Algebra with Mathematica  Kenneth M. Levasseur; Dept. of Mathematical Sciences, Univ. of Massachusetts at Lowell
An assortment of functions illustrated in Visual Mode that are available in the AbstractAlgebra Packages. Identity; Inverses; AssociativeQ; AbelianQ; CayleyTable(s); OrderOfAllElements; Commutators; GroupExponent; Dihedral; Morphoids/PreservesQ; VisualizeMorphoid;
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 The Exponential Curve  Dan Greene
A blog by a math teacher at Downtown College Prep charter high school (San Jose, California), where the students "... are primarily Latino, are far below grade level in their math and reading skills, and will be the first in their families to go to college.
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 Exponential Fit: Running to Conclusions (MSTE)  Ed Malczewski; University of Illinois at UrbanaChampaign (UIUC)
A lesson that explores the process of finding the best fitting exponential curve to sets of data like the world record times for running the mile. Requires Internet access, a bag of Skittles, and Microsoft Excel. Analyze exponential fit for population
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 Fano Varieties and Extremal Laurent Polynomials  Coates, Tom; Corti, Alessio; Galkin, Sergey; Golyshev, Vasily; Kasprzyk, Al
This research collaboration blogs about the creation of a directory of all possible shapes and geometric building blocks in the universe  the equivalent of a periodic table of the elements for three, four, and fivedimensional shapes. Along the way,
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 Federal Geographic Data Committee (FGDC)  Federal Geographic Data Committee (FGDC)
An interagency committee that promotes the coordinated use, sharing, and dissemination of geospatial data on a national basis. Search for data in the National Spatial Data Clearinghouse; browse related information in registered Clearinghouse Websites,
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 Federal Resources for Educational Excellence (FREE)
A site for finding federallysupported educational resources. There are subject listings (including Mathematics) and a search engine, favorite sites (reviewed by users), more sites for students, comments and feedback forms, and the opportunity to be a
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 Florida EXPLORES!
Brings the NOAA Direct Readout Satellite Ground Station Program into Florida's K12 Classrooms. Precipitation summary, Atlantic hurricane season, satellite imagery, weather observations and model products, Data Center, teacher resource guide, GOES8 status
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 FoV
Puzzles and pointers on math and programming from a future secondary school math teacher in England. Blog posts, which date to March, 2010, have included "Make 42," "Find a, b and c," "Programming Mahjong Scoring," "Broken Geometry," and "Using Mersenne
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 Fractals  Cynthia Lanius
This lesson plan for exploring fractals is designed so 4th through 8th grade students can work independently and be assessed innovatively. It conforms to the 1989 NCTM standards, and provides links to other fractal sites. Contents: Why study fractals?
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 A Functional Housing Market  Susan Boone
Students use the Internet to search for housing prices in Houston, Texas, (the location can be changed to accommodate any location) and compare the prices to the number of square feet found in the living area of a house. A linear equation is derived from
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 Fun with Probability! The Probable Pen in the Cereal Box  Michael Cornell; College of Education, Univ. of Illinois at UrbanaChampaign
A cooperative classroom project for grades K9. Over a threeweek period (24 April  10 May 1996), project participants jointly calculated the expected value of a simple probability problem via experimentation. This joint effort among interested schools
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 Geometer's Sketchpad  Berger, Witzman, Pearson, Vang; The Geometry Center
Introducing elementary and secondary educators to the operation of Geometer's Sketchpad. Lessons allow teachers to access illustrations of some sample classroom uses, teaching some of the advanced functions of Sketchpad that make it a unique tool for
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 Geometry Gallery of Imaginary Animals (TEAMS)  Jeannie Toshima; TEAMS Distance Learning, Los Angeles County Office of Education
Students choose geometry terms and create drawings of imaginary animals from those geometric shapes. In writing, they describe their appearances, behaviors, and habitats. They send their completed drawings and stories to Jeannie to include in her Geometry
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 Geometry Online  Cynthia Lanius
Geometry activities from a geometry class at Milby High School in Houston, Texas. Topics include: History of Geometry (contributions of Egyptians, Babylonians, and Greeks, with links to biographies of major contributors to geometry); Hidden Polygons (locate
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 GirlTECH  Cynthia Lanius; Center for Research on Parallel Computation (CRPC)
GirlTECH was a teacher training and student council program that encouraged young women to pursue careers in mathematics and science, offering intensive technology training to explore innovative teaching strategies for gender equity in the classroom through
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 The Global Schoolhouse  Global SchoolNet Foundation (GSN)
A site for teachers, parents, teens, and kids, with articles on telecommunication in the classroom, contests, events, projects, an alphabetical site index, and an annotated list of all articles. Formerly called FrEdMail (Free Educational Mail), GSN is
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 The Global Schoolhouse  Global SchoolNet Foundation (GSN)
The Global Schoolhouse focuses on projects for lifelong learning and uses the most powerful Internet tools, including live video, to link K12 classrooms to their communities and to other children around the world. Projects that discover and document
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 Global Student Network  Global Student Network, LLC
Provider of online homeschool curriculum, delivered entirely over the Internet. Over eighty courses for grades 212. Free online demo.
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 The Golden Ratio  Blacker, Polanski, Schwach; The Geometry Center
Introduction to the Golden Ratio and Fibonacci Sequence. Instead of simply supplying definitions and asking the student to engage in mindless practice, students work through several activities to discover the applications of the Golden Ratio and Fibonacci
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 Googol Learning  Susan Jarema
"It wasn't until I began teaching my own children math and had to relearn it that I began to see its beauty...." From the family publishers of the Discovery Multiplication Program, music such as "Multiplication Vacation," and other educational DVDs, games,
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 The Great Paper Airplane Challenge (TEAMS)  Jeannie Toshima; TEAMS Distance Learning, Los Angeles County Office of Education
Use origami to build the farthest flying airplane, and win the challenge. TEAMS looked for the farthest flying airplanes throughout the nation  the best
from each class. Students sent in the written directions (diagrams were acceptable) for folding
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 The Great Probability Challenge  Daniela Cupples
In this handson probability and statistics learning experience, students perform a coin toss experiment, then predict, analyze, and present their experimental findings with visual graphing representations. Throughout the 20102011 school year, students
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 Hands Across America (TEAMS)  Jeannie Toshima; TEAMS Distance Learning, Los Angeles County Office of Education
How far can we get across the United States if we all join hands and measure the length of the line? In 199495 7,164 participants yielded a total of 19,546.22 feet. Your students might want to put the information into a database, creating fields to compare
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 Hexa Trex  Bogusia Gierus
Find a path through all the tiles to make a math equation. Read more rules about the Hexa Trex puzzle, and challenge yourself to solve the new challenges that Gierus blogs regularly.
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 HillsdaleLenaweeMonroe Math and Science Center
From eastern Michigan, USA. Interactive sessions and information on water studies for high schools, including data collection on frogs and toads, a virtual marsh tour, water quality studies, TI calculator programs, and links to math/science sites.
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 HitTrackerOnline  Greg Rybarczyk
Hit Tracker "determines the true distance a home run travels by recreating the precise trajectory the ball followed during flight, and extending that trajectory all the way back to field level to allow 'measurement' of the home run." Hit Tracker's spreadsheet
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 Homeschool Math Contests  Haddon Fox
A list of dozens of math contests open to individuals and which do not require gathering up teams  a requirement that often poses a challenge for homeschoolers. homeschoolmathcontests.com also lists many more regional meets sponsored by colleges and
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 HOTmaths  HOTmaths Pty Ltd
HOTMaths' interactive online math learning and teaching resources include interactive activities, a math dictionary, and Scorcher, an online basic mental arithmetic skillsbuilding competition. All content aligns with Australia's early secondary school
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 Houston Area RealTime Traffic Report  Susan Boone
Students calculate the time needed to travel a certain distance given the rate of speed with data collected using "realtime" traffic maps of the greater Houston area. Over a period of one week, one month, and one school year, traffic patterns are studied
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 Hydroponics Project Page  Holtz, Cooper; Levering School, Philadelphia, PA
A project plan for a seventh grade class that involves growing different hydroponic gardens and measuring and graphing the results. Included on this site are: project summary reports, pictures of the kids and the gardens, results chart, movie, standards
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 HyperMath  Carl R. (Rod) Nave; Georgia State University
HyperMath uses concept maps to explore mathematics ideas and applications to physics and astronomy. Originally developed in HyperCard, HyperMath covers the topics of algebra, trigonometry, geometry, vectors, linear algebra, logarithms, exponents, calculus,
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 HyperPhysics  Carl R. (Rod) Nave; Georgia State University
HyperPhysics uses concept maps to explore physics ideas and applications. Originally developed in HyperCard, the networklike environment provides for numerical exploration in the form of active formula and standard problems implemented in Javascript.
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 iBerry Maths and Computer Science  Gordon Lockhart
iBerry assembles and coordinates information about open educational resources, including publicly accessible courseware, lecture notes, videos, slides, podcasts, exam questions, software, and demonstrations. See also iBerry's news aggregator and Learner
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 IDEA: Internet Differential Equations Activities  Thomas LoFaro; College of Sciences, Washington State Univ. (WSU)
Interdisciplinary computerbased activities for differential equations: a database of computer activities illustrating both mathematical concepts and the application of these concepts in a wide variety of disciplines. DynaSys, Java differential equations
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 IMAGINARY  Mathematisches Forschungsinstitut Oberwolfach
A platform for open and interactive mathematics. Explore events, exhibitions, programs, galleries, handson, and films  and share your own activities, projects, and discussions. Started as a maths and arts exhibition for the German Year of Mathematics
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 INDY 500  Susan Boone
Students find the mean and median speed for the Indianapolis 500. Rates per lap are calculated, as well as the length of each lap. Students research information and collect data via the Internet.
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 Integrating the Internet  Susan Hixson
Primary resources, projects, a weekly newsletter, units of study, and "Internet in the Classroom," a tutorial to help in planning projects and class homepages. Includes links to an annotated list of primary resources for mathematics, and a page of links
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 The Interactive Mathematics Program (IMP)  Chicago, Univ. of Illinois
A Model for Mathematics Education Reform. A fouryear, problem based mathematics curriculum for high schools, to meet the needs of both collegebound and noncollegebound students. IMP is designed to replace the fourcourse sequence typical of most high
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 International Telementor Program  Colorado Nonprofit Development Center
Students and mentors from ITP sponsors collaborate in a safe and secure projectbased environment with facilitation from a teacher or parent. Teachers may submit projects throughout the year. Research on the effectiveness of the program and articles about
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 The Internet Pizza Server  Susan Boone
A lesson on data collection, unit price, proportions, research, and area of circles. Students create their own pizzas using choices of toppings. They "order" their creations from the Internet and see digitalized versions of their pizzas. They use their
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