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```    MATH TOOLS NEWSLETTER - JUNE 5, 2009 - No. 76

***NEW YORK TIMES KNOWLEDGE NETWORK COURSES
http://www.nytimesknownow.com/professional-development/

The New York Times is proud to welcome the Math Forum to
its Knowledge Network of prestigious educational
institutions delivering lifelong learning programs. View
syllabi, testimonials from past participants, and
registration information on the Math Forum site:

http://mathforum.org/pd/

Registration closes at 5 pm ET this Friday, June 5, for
these courses scheduled to begin next week:

* Problem Solving Strategies
* PoW Class Membership: Resources & Strategies for
Effective Implementation
* Teaching Math with the Problems of the Week
* Problem Solving in Geometry and Measurement, Course 1
* Moving Students from Arithmetic to Algebra...one step
at a time
* The Math Forum's Problem Solving Process

For \$149 enjoy connecting with Math Forum community members,
reflect on mathematical practices for you and your students,
and earn 1.5 CEUs. Don't miss out on our spring special ending
June 30th! Combine an upgrade to a class membership or renew
up to 33% off the total cost.

http://mathforum.org/redirect-sales.html

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***FEATURED DISCUSSION
Simple question...or not
Susan asks, "Is a constant function a linear function? I've
seen it argued both ways. Please weigh in!"

***FEATURED DISCUSSION
sudoku fractions edition
DanielAjoy announces, "I want to share the Sudoku fractions
puzzles that I developed over the past couple of weeks."

***FEATURED ACTIVITY
Activity: Estimating the Size of Fractions by Using Benchmarks
http://mathforum.org/mathtools/activity/81366/
Victoria Miles
This activity helps students to understand when to round
fractions to 0, 1/2 or 1. By sliding a lever, students create
visual models to represent fractions. Students decide whether
the fractions are closest in size to 0, 1/2, or 1. Students
then look for patterns and come up with a rule of rounding
fractions to benchmark values of 0, 1/2 or 1. Extension problems
involving mixed numbers follow the interactive exploration.

***FEATURED TOOL
Tool: Multiplying and Dividing Signed Numbers
http://mathforum.org/mathtools/tool/81437/
a Quia web subscriber
Play a concentration or memory style game using the rules for
multiplying and dividing integers.

***FEATURED TOOL
Tool: Long multiplication
http://mathforum.org/mathtools/tool/81198/
Alexander Bogomolny
A Java applet presents multiplication of two numbers in a
standard, long form. Options include displaying and removing
trailing zeros and skipping a product by a zero digit. Both
numbers are easily modifiable. The applet demonstrates
multiplication in various bases.

***FEATURED TOOL
Tool: Product of Simple Fractions
http://mathforum.org/mathtools/tool/81159/
Alexander Bogomolny
This is a Java applet that shows two simple fractions and
their product, all three graphically illustrated. The two
factors are easily modifiable by clicking on the numerators
and/or denominators. The applet also features a Simplify
button, which rewrites fractions in lowest terms.

***FEATURED TOOL
Tool: Online Grapher
http://mathforum.org/mathtools/tool/81229/
Franz Embacher, Petra Oberhuemer, University of Vienna
This Java applet can be used to graph functions using
function notation. It allows zooming and rescaling.

***FEATURED TOOL
Tool: Fair Division: Method of Lone Divider
http://mathforum.org/mathtools/tool/81204/
Alexander Bogomolny
An interactive tool for the study and implementation of
the Lone Divider method, in which one player divides the
goods into pieces and each player states which piece they
would accept as a fair share. The tool allows for setting
up the choosers' preferences and suggests a possible fair
division of goods based on such a setup.

CHECK OUT THE MATH TOOLS SITE:

Math Tools  http://mathforum.org/mathtools/
Register  http://mathforum.org/mathtools/register.html
Discussions  http://mathforum.org/mathtools/discuss.html
Research Area  http://mathforum.org/mathtools/research/
Developers Area  http://mathforum.org/mathtools/developers/