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    MATH TOOLS NEWSLETTER - September 17, 2010 - No. 91

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Math Tools now has over 5,000 people participating in 
discussions about our digital library community! So as you 
browse the catalog, take a moment to rate a resource, 
comment on it, review it -- join an existing conversation, 
or start a new discussion!

***FEATURED DISCUSSION
Three trig functions added!
http://mathforum.org/mathtools/discuss.html?&do=m&thread=___disc_86519_g-1
JohnPage informs us, "I just saw the review of this tool and 
noted the comment that the trig functions sec, csc and cot 
were missing. In response to that I went ahead and added them."

***FEATURED TECHNOLOGY POW
Technology PoW: Math at the Snack Bar
http://mathforum.org/mathtools/tpow/99997/
Suzanne Alejandre; applet by Alexander Bogomolny
See how the distributive property can help visualize shopping 
purchases.
NOTE: A free login is required. Sign up using the link on the 
login page, or with your existing KenKen or Problems of the 
Week login.

***FEATURED TECHNOLOGY POW
Technology PoW: Runners
http://mathforum.org/mathtools/tpow/17540/
Claire Mead
Tell how a runner's step size predicts the time it takes to run 
from the building to the tree. A link to a Java applet from 
NCTM's Electronic Examples, Principles and Standards for School 
Mathematics is provided to help students think about the problem. 
NOTE: A free login is required. Sign up using the link on the 
login page, or with your existing KenKen or Problems of the Week 
login.

***FEATURED TOOL
Tool: Interactive Circle
http://mathforum.org/mathtools/tool/100167/
Jamie Tubbs
Use the interactive circle to create a radius, diameter, tangent,
chord, sector, inscribed angle, central angle, segment, arc, 
semicircle, or intersecting chords. Designed for projection on 
an interactive whiteboard.

***FEATURED TOOL
Tool: Guess My Number 1-100
http://mathforum.org/mathtools/tool/99613/
BCC/Netmedia
A guessing game to find out what number the computer is thinking 
of. The activity can be used to develop number recognition and 
sequencing up to 100.

***FEATURED TOOL
Tool: Difference between Two Times
http://mathforum.org/mathtools/tool/99611/
BCC/Netmedia
Practice calculating how long a bus trip takes from its 
timetable, and other differences between two times.

***FEATURED TOOL
Tool: Decimals Whiteboard Teacher Pack
http://mathforum.org/mathtools/tool/99893/
Jamie Tubbs
Teach your students the basics of decimals with this set of 
interactive whiteboard mini-movies. Use the animations to 
represent commonly used decimals like tenths and hundredths; 
generate equivalent forms of decimals; and compare and order 
decimals. The animations are free, but available for purchase 
are a teacher's guide and printable worksheets.

***FEATURED TOOL
Tool: Panda Geometry Problem -- the traditional way
http://mathforum.org/mathtools/tool/99198/
Faster-Than-Light Math!
This 3-D animated video walks through a conventional approach 
to solving a geometry problem. Log in to watch an alternate method.

***FEATURED TOOL
Tool: Paycheck
http://mathforum.org/mathtools/tool/75657/
Michael Backus
Students calculate net income and discover how much money they 
pay in taxes and for benefits in the process.


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     The Math Forum @ Drexel -- 17 September 2010