16 August 1999 Vol. 4, No. 33
THE MATH FORUM INTERNET NEWS
Visualizing Infinite Series  Lanius  NASA Spacelink  Dictionary of Units of Measurement
VISUALIZING AN INFINITE SERIES  Cynthia Lanius
http://math.rice.edu/~lanius/Lessons/Series/infinite.htm
This lesson uses a trapezoid successively divided in fourths
as a visual representation of an infinite geometric series,
a mathematical concept that is often only treated
symbolically.
Explorations are outlined for investigating a number of
series, and links to related sites are provided.
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NASA SPACELINK
http://spacelink.msfc.nasa.gov/.index.html
An aeronautics and space resource for educators.
Math curriculum support instructional materials range from
exploring meteorite mysteries and the mathematics of
microgravity to the mathematics of space and rocketry; and
also list related NASA Internet sites. (Follow the links
from Spacelink Home > The Library > Instructional Materials
> Curriculum Support > Mathematics.)
Educator Focus concentrates on subjects of interest to
educators that otherwise might be overlooked.
http://spacelink.nasa.gov/Educator.Focus/
The library houses the NASA Education Division's electronic
publications and NASA's Internet resources, with hundreds of
subjectoriented pages organized into educational services,
instructional materials, a NASA overview, projects, news,
and frequently asked questions.
http://spacelink.msfc.nasa.gov/xh/library.html
Hot topics highlight current events related to NASA science,
technology, and education.
http://spacelink.msfc.nasa.gov/Spacelink.Hot.Topics/
Cool picks offer intriguing and educational NASA materials
and sites.
http://spacelink.msfc.nasa.gov/Spacelink.Cool.Picks/
Subscribe to the Spacelink EXPRESS mailing list and receive
email announcements of new educational materials produced
by the NASA Education Division.
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HOW MANY? A DICTIONARY OF UNITS OF MEASUREMENT  Rowlett
http://www.unc.edu/~rowlett/units/
A dictionary of both metric (SI) and English measurement
units, with history, links to related sites, and a
bibliography. Contents include:
 Using the Dictionary: numbers and units, names of large
numbers, symbols and abbreviations
 The International System (SIPM): SI fundamental and
derived units, metric prefixes
 The English Customary Systems: the metric system, CGS and
MKS units, spelling of metric units, the metric system
in the United States
 Links to Related Sites
 Bibliography
This dictionary has been compiled by Russ Rowlett, the
Director of the Center for Mathematics and Science Education
at the University of North Carolina at Chapel Hill.
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