### Volume 9, Number 33

 ```16 August 2004 Vol. 9, No. 33 THE MATH FORUM INTERNET NEWS Education: National Corn Growers Association Biased Rectangles? | STELLA | Stella2java EDUCATION: NATIONAL CORN GROWERS ASSOCIATION http://www.ncga.com/education/guide/bycurriculum.html The National Corn Growers Association (NCGA) has developed "Korn for Kids," which provides information related to corn, its diverse uses and impact on daily life. Lessons include: Math - You Can Count on Corn - Weather or Not to Act - Rate that Trait - Yield Map Math - Meaty Numbers - The State of Ethanol Use - Export Math! Science - Tour a Power Plant - Corn Eats Lunch - Topsoil Dessert - Prolegs, Head Capsules & Warts - Give Me an "I" "P" "M" - Genes-R-Us - Farm or Pharmacy? - Satellite Science - A Food Pyramid Built From Corn - Corn that Bounces & Stretches - Kernel Surgery - Starch Your Day Right! -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- BIASED RECTANGLES? http://mathforum.org/pcmi/hstp/resources/rectangles/ This classroom activity, a PCMI Resource for Teachers, is an adaptation of a lesson from the NCTM "Navigating through Data Analysis in Grades 9-12," chapter 1, to be used with Fathom rather than a graphing calculator. The original "100 rectangles" sheet (Random Rectangles) comes from "Activity-Based Statistics," Key College Publishing. Students explore one example of how bias affects the mean. This simulation increases students' understanding of the significance of sample size on the calculation of the mean. Materials developed by Carol Hattan, Beverly Farahani, David Kapolka, Marie Lusk, David Hernandez, Patricia Daniel, and Cheryl Foox include: - Activity Guide - Sketchpad file of the 100 rectangles - Fathom file -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- STELLA http://www.iseesystems.com/softwares/Education/StellaSoftware.aspx By isee systems, STELLA (Systems Thinking Experimental Learning Laboratory with Animation) is a model building and simulation software package. At the site: - Read about STELLA-based materials - Get help with STELLA training - Seek live support building a model - View tutorials - Purchase supporting books and videos - Run models online using NetSim \|/ STELLA2JAVA http://www.shodor.org/stella2java/ Stella2java models are Java applets created from STELLA equation files. In this process, initial conditions and converters of your choice can be replaced with slider bars, and your choice of stocks and converters can be shown in a graph, allowing for a more direct visualization of the result of dynamic models. Converters can be set by either a slider bar, or left as what they are in STELLA. Initial conditions can be set by either a slider bar, or left at the STELLA value. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- 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 Ask Dr. Math Books http://mathforum.org/pubs/dr.mathbooks.html _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ ```