9 February 1998 Vol. 3, No. 6
THE MATH FORUM INTERNET NEWS
Graphing Linear Equations  Polyominoes  Lanius  Journals  Penn State
ALGEBRA I: GRAPHING LINEAR EQUATIONS  Tim O'Brien
http://www.terragon.com/tkobrien/algebra/index.html
A Master's Degree project designed to provide an
understanding of the graphing of linear equations at
the Algebra 1 level.
Twelve topics are covered:
 Ordered Pairs
 Graphing Equations 1
 Graphing Equations 2
 Horizontal Lines
 Vertical Lines
 Slope
 Equations and Slope
 Find Equation of Line
 Scatter Plots
 Parallel Lines
 Perpendicular Lines
 Solve a System.
Also included are Quizzes and Tests; Ask the Teacher (email a
question); a Discussion Room, Glossary, Index, and Message
Board; a Crossword Puzzle and Word Search; and an Internet
project predicting the number of people who will vote in the
year 2004.
O'Brien provides a simple scientific calculator and a plotter
that can graph functions, differentials, and integrals
to help with algebra, trigonometry, and calculus homework.
A Javaenabled browser is needed to use the applets and
scripts found throughout the site.
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POLYOMINOES  Cynthia Lanius
http://math.rice.edu/~lanius/Lessons/Polys/poly1.html
A Web unit for home schoolers or classroom teachers with an
introduction to triominoes, tetrominoes, and pentominoes that
provides colorful illustrations, leads students to discover
the 12 pentominoes, and challenges them to draw as many of
the 35 different hexominoes as they can.
An investigation into the perimeters of polyominoes asks
students to find patterns, make predictions, complete a
table of minimum and maximum perimeters, and graph the
ordered pairs as points on a coordinate plane. A final
task is to find the curve of best fit for the long and
short perimeters.
Teachers' Notes and links to polyominoes on the Web are
also included in this unit.
For another look at how Cynthia Lanius uses hypertext and
the Web in her classroom at Milby High School in Houston,
Texas, see GEOMETRY ONLINE:
http://math.rice.edu/~lanius/Geom/
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ELECTRONIC AND PRINT JOURNALS
Penn State's Comprehensive List
http://www.math.psu.edu/MathLists/Journals.html
Links to dozens of journals, from the Academic press
electronic journal library to the Ulam Quarterly. The list
also spans printed journals from Abstract and Applied
Analysis to the Zentralblatt fur Mathematik. A link to
the Bibliotheque Mathematique et Informatique at the
University of Bordeaux provides another table of contents
for online journals:
http://almira.ceremab.ubordeaux.fr/cgibin/periodiques?
and Penn State's page of preprints follows:
http://www.math.psu.edu/MathLists/Preprints.html
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