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25 August 2003 Vol. 8, No. 34 THE MATH FORUM INTERNET NEWS Count Us In! | USA Mathematical Talent Search Clockworks: From Sundials to the Atomic Second COUNT US IN! - LEARN ONLINE http://www.abc.net.au/countusin/ This site sponsored by the Australian Broadcasting Corporation features fifteen colorful counting and math games designed to help young children understand basic number concepts. Each game has directions and some have levels of difficulty to choose from. Number concepts include: - Comparing and Classifying - Patterning - Counting - Ordinal Numbers - Representing Number 1-5 - Representing Number 6-10 - Addition - Subtraction - Data - Time - Numbers - Chance - Halves - Length - Volume Teacher resource materials are available for each number concept. The games can be played interactively online and also be downloaded in PC and Mac versions. The online versions require Flash. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- USA MATHEMATICAL TALENT SEARCH http://www.nsa.gov/programs/mepp/usamts.html Four times during the academic year, participants in the USA Mathematical Talent Search (USAMTS) are given a month to work five challenging problems using any books, calculators, computers, etc. -- but all the work must be their own. Carefully written solutions are required for each problem. The problems range in difficulty from being within reach of most high school students to challenging the best students in the nation. Solutions are graded by mathematicians and comments are returned to the participants. The USAMTS is one of the ways to enter the process for selecting the USA Mathematical Olympiad team, which participates in the annual International Mathematical Olympiad. With permission, USAMTS participants' names and addresses are provided to colleges, universities, potential employers, and mathematical enrichment programs for recruitment purposes. The USAMTS is sponsored by the National Security Agency, the largest employer of mathematicians in the United States and possibly the world. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CLOCKWORKS: FROM SUNDIALS TO THE ATOMIC SECOND http://www.britannica.com/clockworks/main2.html Britannica.com presents a site about the development of instruments that have measured time over the centuries. Each instrument has a page featuring a description and an illustrated diagram; most include a QuickTime animation demonstrating how the mechanism works. Time instruments include: - Sundial - Clepsydra - Astrolabe - Candle clock - Sandglass - Weight-driven clock - Spring-driven clock - Pendulum clock - Quartz watch - Cesium atomic clock See also the Measuring Time article: http://www.britannica.com/clockworks/t_article.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum http://mathforum.org/ Ask Dr. Math http://mathforum.org/dr.math/ Problems of the Week http://mathforum.org/pow/ Mathematics Library http://mathforum.org/library/ Math Tools http://mathforum.org/mathtools/ Teacher2Teacher http://mathforum.org/t2t/ Discussion Groups http://mathforum.org/discussions/ Join the Math Forum http://mathforum.org/join.forum.html Send comments to the Math Forum Internet Newsletter editors Donations http://deptapp.drexel.edu/ia/GOL/giftsonline1_MF.asp _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ |

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