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   MATH TOOLS NEWSLETTER - July 23, 2010 - No. 89

***Numeracy and Financial Literacy Summer Institute
http://mathforum.org/fl/institute2010/
The Math Forum invites teachers of 6th-12th grade mathematics 
to participate online.
Apply here by July 27:
http://mathforum.org/fl/online.html

***Math Forum Online Course
Moving Students from Arithmetic to Algebra...one step at a time
http://mathforum.org/pd/movingstudents/
July 29 - August 13, 2010 (2 week intensive)
Registration closes at 5 pm ET on Tuesday, July 27, 2010.

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As you browse the catalog, please take a moment to rate a
resource, comment on it, review it -- join an existing
conversation, or start a new discussion!

***FEATURED TOOL
Tool: Broken Calculator
http://mathforum.org/mathtools/tool/97212/
Duncan Keith
Eric's calculator has lost most of its keys. Can you find a 
way for the leftover keys to generate the target numbers?

***FEATURED TOOL
Tool: Conic_Connections
http://mathforum.org/mathtools/tool/98098/
Kent Thele
Manipulate a plane and double-napped cone to generate graphs 
and equations of conic sections. Eccentricity, foci, and 
directrices are also illustrated in both 2- and 3-D.

***FEATURED TOOL
Tool: Integer Multiplication
http://mathforum.org/mathtools/tool/97159/
Brainingcamp Interactive Math
Visual models show how integer multiplication can be thought of 
as repeated addition or subtraction. Investigate how the sign of 
the factors determines whether the product is positive or negative.

***FEATURED TOOL
Tool: Counting Steps
http://mathforum.org/mathtools/tool/96941/
Wayne Allen Bateman
Trace paths through this addition grid counting puzzle using 
exactly the number of steps shown on the point you choose.

***FEATURED TOOL
Tool: Box Plot Lesson and Virtual Manipulative
http://mathforum.org/mathtools/tool/97157/
Brainingcamp Interactive Math
The Box and Whisker Plot lesson includes visuals and audio 
narration. A virtual manipulative lets users enter and modify 
a data set and see the box plot update in real time. A question 
set can be used for basic assessment.

***FEATURED TOOL
Tool: Diagonal Differences
http://mathforum.org/mathtools/tool/97202/
Duncan Keith
This tool arranges the numbers 1 to 64 in an 8x8 grid, then 
outlines a 3x3 square within that grid. Multiply the diagonal 
corners, then take the difference of your results. Is that 
difference the same for any 3x3 square within this grid? What 
about different sizes of grid and square? Can you find a pattern?

***FEATURED TECHNOLOGY POW
Technology PoW: Beat the Odds?
http://mathforum.org/mathtools/tpow/97416/
Carol Speck
Can you beat the odds and always choose the right door?
NOTE: A free login is required. Sign up using the link on the 
login page, or use your existing KenKen or Problems of the Week 
login.


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Newsletter Archive  http://mathforum.org/mathtools/newsletter/

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      The Math Forum @ Drexel -- 23 July 2010