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Math Tools Newsletter
December 23, 2013 - No. 127


The 2014 Year Game challenges students to write expressions for 
each of the counting numbers 1 through 100, using the digits in 
the year 2014, standard operations, and grouping symbols. View 
the rules, worksheet, and manipulatives for 2014 now before 
submitting your own solutions starting January 1st, which we'll 
start displaying on February 1, 2014.

Does any rectangle have perimeter and area of the same numerical 
value? Can the plane be tiled with kites and chevrons? In how many 
ways can 1/2 be written as a sum of unit fractions? Come investigate 
these questions  and find out how they are related  at the 
Park City Mathematics Institute (PCMI). A program of the Institute for 
Advanced Study (IAS), PCMI has just begun accepting applications 
for the 2014 Summer Session of the IAS/PCMI Secondary School 
Teachers Program (SSTP). Participating teachers receive full support 
and a stipend during this residential program, which takes place in 
Park City, Utah, from June 29 - July 19, 2014. Six quarter-credits of 
400-level mathematics are available from the University of Washington.

The Illuminations site now sports a right-hand panel for searching 
its interactive tools and instructional support according to the 
NCTM Principles and Standards along with Common Core State Standards 
in Mathematics (CCSSM). With the re-design, NCTM has also rolled out 
more than 40 new lesson plans. Illuminations is a project designed 
by NCTM and supported by the Verizon Foundation.

Featured Resources
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.

Tool: Virtual Paper Cut and Fold - Mike Sokolov
Learn how to make snowflake patterns and create a five-pointed star. 
The interactive site offers both a Flash tool and a faster, more 
fully-featured Java applet that allows you to save the snowflakes to 
a gallery, as well as links to other sites with instructions for making 
snowflakes and stars by folding and cutting paper.

Tool: Old Egyptian Fractions for Android - Wendy Petti & Maurici Carbo
This is the android version of the Mathcats Old Egyptian Fractions:
Old Egyptian Math Cats knew fractions like 1/2 or 1/4 (one piece 
of a pie). But to make fractions like 3/4, they had to add pieces of 
pies like 1/2 + 1/4 = 3/4. Old Egyptian Math cats never repeated 
the same fraction when adding. They never wrote: 
1/4 + 1/4 + 1/4 = 3/4. With the Android app Old Egyptian Fractions 
can practice this type of decomposition in a very visual way.

Tool: Koch Snowflake: Java Version - Cynthia Lanius
Users will build the Koch Snowflake incrementally using a Java Applet.

Tool: CPI Inflation Calculator - Bureau of Labor Statistics
The CPI inflation calculator uses the average Consumer Price Index 
for a given calendar year. This data represents changes in prices 
of all goods and services purchased for consumption by urban 
households. This index value has been calculated every year 
since 1913. For the current year, the latest monthly index value 
is used.

Tool: KENKEN Classic II (for Android) - KenKen Puzzle
KenKen is a grid-based logic puzzle and math game. For a 
3x3 puzzle, use the numbers 1-3; for a 4x4 puzzle, fill in with 
numbers 1-4; for a 5x5 puzzle, use the numbers 1-5, and so on. 
Do not repeat a number in any row or column. Full instructions 
are available in the app for your convenience.

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