 Twenty Tosses (TEAMS)  Jeannie Toshima; TEAMS Distance Learning, Los Angeles County Office of Education
Toss a coin twenty times, and share class results. Students predicted how many heads or tails they might get if they toss a coin 20 times; tossed coins 20 times and recorded their results; compared their predictions with the actual results; teachers collected
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 Untangled  Mehta, Gayatri; Luo, Xiaozhong; et al.
Map and place logic blocks in this game to make more compact circuit layouts on a grid  and more efficient computer chips. Visually appealing graphs bring nodes closer to parents or children and untangle knots in graphs; behind the scenes, the accumulated
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 U.S. Olympic PBS Cyber School  IBM
Built around the 1998 Olympics in Nagano, Japan, the PBS Cyber School uses downhill skiing, snowboarding, and figureskating to offer problemsolving challenges for middle school students, who are invited to build their own site using the IBM HomePage
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 The Valuation Theory Home Page  FranzViktor Kuhlmann
A forum for all mathematicians who work in valuation theory or apply valuation theoretical results in their own field of research. The home page offers: information about conferences and special events; names and email addresses of mathematicians working
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 Variance and Covariance: How Much Money Do Baseball Players Really Make? (MSTE)  Ed Malczewski; University of Illinois at UrbanaChampaign (UIUC)
An exploration of idea of variance and how it is used in statistics. The average (mean) salary of a ballplayer in the majors leagues is $1.2 million dollars. Given only this fact, it is easy to see how the perception of the overpaid baseball player was
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 Video Mosaic Collaboration
"Watching students grow with math": this interactive collaboration portal integrates the Robert B. Davis Institute for Learning Video Collection (Rutgers University) — a video collection spanning two decades capturing mathematics learning experiences
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 The Virtual High School
The Virtual High School project is a collaborative of high schools from around the country. In exchange for contributing a small amount of teaching time, a school in the collaborative can offer its students webbased courses ranging from advanced academic
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 Weather Underground  University of Michigan
One Sky, Many Voices: resources for collaborative study of current weather events for K12 classrooms, afterschool groups, and athome learning. Gather data on weather information on the Web, current conditions around the world, historical weather patterns,
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 Web Hunt  Mary Gasch; Nerinx Hall, Webster Groves, MO
A Webbased hunt centering on nonEuropean mathematics, with links provided to the mathematical contributions of a variety of cultures. Students may submit answers to their own teachers via an onsite form.
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 What Good is Math?  Peck, Rosser, Pifer; University of Richmond
A site designed to show middle school students how math is useful. Examples are drawn from everyday experience; topics include art, finance, grades, sports, planning a party or a trip, and cooking. Created by preservice math teachers.
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 What's the City Mileage of a Typical American Car? (MSTE)  Ed Malczewski; University of Illinois at UrbanaChampaign (UIUC)
Analyze the data and find an average for the mileages of American cars. A
problem like this can sometimes involve difficult and timeconsuming statistical analyses, but in this lesson you will explore a method of analysis called the bootstrap that will
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 Which One Doesn't Belong?  Mary Bourassa
Also known as Imposter Sets, "Which One Doesn't Belong?" provides thoughtprovoking puzzles, each with many different, correct ways of identifying the exceptional shape, number, graph, or equation from the colorful 2 × 2 grid of similar ones.
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 Wildlife Trade: Buyer Beware  Shelly Peretz, Thornridge High School, Dolton, IL
Collecting and analyzing consumer values, attitudes, and beliefs regarding wildlife trade and endangered species: a project that demonstrates the feasibility of integrating learning strategies, math, social studies and science within a traditional high
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 WIMS (WWW Interactive Mathematics Server)  Université de Nice  Sophia Antipolis
Interactive mathematical applications, also available in French, with documentation. The server's exercises and programs are designed to find a polynomial with given values; find the Taylor expansion of a function; find a polynomial from its curve; given
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 World of Teaching
Free Microsoft PowerPoint and whiteboard presentations for teachers. In particular, browse or contribute to the maths downloads. Formerly teacherpowerpoints.com.
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 Wright Flyer Teachers' Lounge  National Aeronautics and Space Administration
Lesson plans include Wind Tunnel Data (lift and drag); Know all the Angles (does pitch affect lift?); Watch Your Altitude (the three axes of rotation and the movements of roll, pitch, and yaw); Getting the Wright Pitch; and Up, Up and Away (compare the
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 Yellowstone Caldera  Tina DeBuff; Harlowton High School, Harlowton, MT
This Webquest for high school math and science students requires that they make predictions based on historical data about volcanic activity and damage related to the Yellowstone Park Caldera.
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 Your Online Exchange to Additional Math Solutions  amaths.com
Tutoring, lessons, and tips for learning math; fun math topics; a marketplace for selling your used textbooks; and bulletin boards for discussion. Designed for students preparing for the GCE 'O' Level Additional Mathematics examination, based on the newly
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 ZetaTrek  Rohit Gupta
An "online expedition of science and math hobbyists across the world," ZetaTrek mobilizes citizen scientists to promote the history and culture of mathematics, and involves them in research, with particular emphasis on solving the Riemann Hypothesis.
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