Volume 3, Number 20

18 May 1998 Vol. 3, No. 20 THE MATH FORUM INTERNET NEWS Aunty Math | Crystallography - Weber | Euclid's Elements AUNTY MATH - DuPage Children's Museum http://www.dcmrats.org/AuntyMath.html An every-other-week math challenge for grades K-3 from "Aunty Math." Each challenge is presented in the form of a story taken from the life of Aunty Math, her two nephews Barney and Danny, and her niece Gina. Students with questions or suggestions can e-mail Aunty Math directly, and a Tips for the Current Challenge page provides parents and teachers with suggestions for modifying or extending each problem: http://www.dcmrats.org/tips.html Students may also submit solutions and read what others have written from Aunty Math's Solutions page: http://www.dcmrats.org/wwwboard/solution.html Strategies recommended for use by primary students include: - drawing a picture - manipulatives (objects such as buttons, beans, etc.) - searching for a pattern - acting it out - guessing and checking ("trial and error") - making a list, chart or graph - visualizing in the mind The first kindergarten teacher in Illinois to receive the Presidential Award for Excellence in Mathematics Instruction, "Aunt Mathilda" (Angela Giglio) Andrews was also honored by the Illinois Council of Teachers of Mathematics with its Excellence In Elementary Mathematics Teaching award. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CRYSTALLOGRAPHY - Steffen Weber INTRODUCTION TO QUASICRYSTALS http://www.nirim.go.jp/~weber/qc.html A short introduction to the field of quasicrystals, offering some basic concepts in this relatively new branch of crystallography. The more advanced reader may proceed to other sites and sources on quasicrystals, listed and linked in the appendix. This page is intended for those having no prior knowledge in the field. It includes a glossary, and links to software sites and other pages related to quasicrystals. \|/ ANIMATED CRYSTALLOGRAPHIC POLYHEDRA http://www.nirim.go.jp/~weber/POLYHEDRA/p_00.html Polyhedra, developed from a Java applet by John N. Huffman, which can be rotated and resized by clicking and dragging (on a Mac with a one-button mouse, hold down the Command [Apple] key and drag to resize). Applets include everything from a buckyball, an icosahedron, and a cube; to a diakisdodecahedron, hexagonal and tetragonal trapezohedra, trigonal pyramids (tetrahedra), and many more. Born in East Germany, Steffen Weber is currently a Science and Technology Agency Fellow at the National Institute for Research in Inorganic Materials (NIRIM) in Tsukuba, Japan. http://www.nirim.go.jp/~weber/ -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- EUCLID'S ELEMENTS - David Joyce http://aleph0.clarku.edu/~djoyce/java/elements/elements.html "Euclid's Elements form one of the most beautiful and influential works of science in the history of humankind. Its beauty lies in its logical development of geometry and other branches of mathematics. It has influenced all branches of science but none so much as mathematics and the exact sciences. The Elements have been studied [for] 24 centuries in many languages starting, of course, in the original Greek, then in Arabic, Latin, and many modern languages." David Joyce created these Web pages to rekindle an interest in the Elements, and to show how Java applets can be used to illustrate geometry. The text of all 13 Books is complete, and all of the figures are illustrated using the "Geometry Applet," including those that are three-dimensional, found in the last three books on solid geometry. References to Euclid's Elements on the Web are included. \|/ EUCLID'S GEOMETRY: HISTORY AND PRACTICE - Alex Pearson http://mathforum.org/geometry/wwweuclid/ A series of interdisciplinary lessons on Euclid's Elements, researched and written by Alex Pearson, a Classicist at The Episcopal Academy in Merion, Pennsylvania. The material is organized into class work, short historical articles, assignments, essay questions, and a quiz. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- TAPPED IN - MATHEMATICS with Dave Kershaw http://www.tappedin.org/ MONDAY, MAY 18 - 4:00 PM Pacific time; 7:00 PM in the East Wish you had a nickel for every time you've been asked where math is used in the real world? Let's find some answers - bring an example to share with the group. For questions about the discussions or using TAPPED IN, contact Dave Kershaw (kersh@mathforum.org) or Judi Fusco (fusco@tappedin.sri.com). -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- 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/students/ Internet Resources http://mathforum.org/~steve/ 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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