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9 November 1998 Vol. 3, No. 45 THE MATH FORUM INTERNET NEWS 100th Day of School | Geometry - Kutztown | Random Tilings 100TH DAY OF SCHOOL (1) 100TH DAY OF SCHOOL CELEBRATION Loogootee Community Schools http://www.siec.k12.in.us/~west/proj/100th/ A collection of interactive activities, classroom projects, and other suggestions for teachers of children ages 8-14 to help celebrate the 100th day of school: - a 100 E-Mail Messages Project invites classes to exchange e-mail worldwide, linking geography and language arts with math activities - links to relevant sites and ways for classes to search using Yahooligans, a search engine for elementary school students - an Internet Activities Web page offers ideas and a place for people to submit their own suggestions: http://www.siec.k12.in.us/~west/proj/100th/act.htm \|/ (2) 100TH DAY OF SCHOOL WEBSITE Joan Holub http://users.aol.com/a100thday/ A site created by Joan Hulub, the illustrator of the book _The 100th Day of School_ by Angela Medearis (Scholastic), to encourage and enhance 100th Day celebrations in schools. - 100 questions invites students to send questions about writing or illustrating books - 100th Day Books offers a list of publications: favorite math classroom texts, beginning books, stories, game and puzzler books, and books just for teachers of elementary math - 150 Celebration Ideas provides a wealth of suggestions for the classroom, to which you may contribute: http://users.aol.com/a100thday/ideas.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- GEOMETRY WEB PAGE - Kutztown University http://www.kutztown.edu/~fithian/geometry.html Sixteen introductory geometry activities, with explanations, illustrations, instructions for classroom exercises, and test previews: - Tangrams - Golden Ratio - Geoboard - Polygons - Symmetry (in Euclidean geometry, using Mira) - Constructions - Polyominoes and Polyiamonds - Star Polygons - Special Points in Polygons - Polygon Tessellations - Kaleidoscope Tessellations - Escher Tessellations - Space Cubes - Polyhedra - Symmetry in Space - Topological Considerations This and other pages on Mathematics for Business and Fundamentals of Mathematics are authored by Dr. Ephraim Fithian, Professor of Mathematics at Kutztown University of Pennsylvania. http://www.kutztown.edu/~fithian/ -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- RANDOM TILINGS - An Undergraduate Research Project http://web.mit.edu/tiling/ This project investigates different regions of random tilings of nxn squares with 1x2 dominoes: square, hexagon, fortress, dungeon, and Aztec diamond. An Aztec diamond is the set of lattice squares completely inside a square tilted 45 degrees; in this region the dominoes all go in the same direction at each of the corners. This is known as the Arctic Circle phenomenon, because one can prove that for a large Aztec diamond, the polar regions, where the dominoes are "frozen" into a brickwork pattern, are almost always just the regions outside the inscribed circle. The site includes papers relevant to the research project, other papers with more theoretical results, software documentation, a scrapbook of pictures; and "Random tilings in motion," applets that use the Propp-Wilson algorithm to form animated tilings of the various regions: http://web.mit.edu/tiling/www/applets/ The project is directed by Prof. Jim Propp of M.I.T.'s School of Mathematics, and David B. Wilson of the Institute for Advanced Study in Princeton, NJ. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- 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/ Internet Resources http://mathforum.org/~steve/ 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 _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ |

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