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  MATH TOOLS NEWSLETTER - March 30, 2012 - No. 107

***Join Our New Community!
http://mathforum.org/blogs/emp/
Are you an elementary math specialist or a K-5 teacher 
interested in conversations focused on developing your
students' mathematical practices? Join us!

***Math Forum Handouts from T^3 Chicago
http://mathforum.org/workshops/t3/chicago2012/handouts.html
Did you miss us in the booth area or during our sessions at the 
recent T^3 International Conference in Chicago? Want copies of 
our handouts?

***National Council of Supervisors of Mathematics (NCSM)
http://mathforum.org/workshops/ncsm2012/
Visit us in Philadelphia, PA, at the National Council of
Supervisors of Mathematics 44th Annual Conference,
April 23-25, 2012. The Math Forum will have a Sponsor Table in
the Display Area, and we'll also be presenting sessions.

***National Council of Teachers of Mathematics (NCTM)
http://mathforum.org/nctm/2012/
Visit us in  Philadelphia, PA, at the National Council of
Teachers of Mathematics (NCTM) Annual Meeting, April 25-28, 2012.
Stop by Booth 220 in the Exhibit Hall, and attend our sessions.

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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: Digitron Lite
http://mathforum.org/mathtools/tool/163254/
Edin
This game exercises math skills by asking players to quickly
combine numbers and operators to solve common arithmetic
problems. Operators can be changed by tapping on screen, which
cycles them in the following order: +, -, *, /, =. The goal is to
put 5 blocks together and build an equation like 2 + 3 = 5.
This works in all directions -- horizontal, vertical, diagonal
and in reverse. When the player aligns blocks into correct
mathematical expression, all five blocks get removed, freeing
up the space for the blocks above. Arrows show directions in
which each expression is evaluated.

***FEATURED TOOL
Tool: Inverses of 3 by 3 Matrices
http://mathforum.org/mathtools/tool/163506/
R F Barrow
This applet is a calculator for finding inverses of 
3 by 3 matrices, by calculating cofactors and determinants. 
The method is displayed fully, including cases of singular 
matrices which have no inverse. You can enter any matrix 
with integer elements up to 100.

***FEATURED TOOL
Tool: atlas 2 for Mathematica
http://mathforum.org/mathtools/tool/157499/
DigiArea, Inc.
atlas 2 for Mathematica is powerful Mathematica toolbox for 
performing calculations in the general area of differential 
geometry: from formulating and solving 2D/3D problems to working 
with an N-dimensional manifold as a whole. Features and 
applications include:
- Visualization of multidimensional differential geometry
 objects - visualize everything from coordinate systems to 
 surfaces and more, no matter which dimension it has.
- Library of pre-defined differential geometry objects 
 including 2-D and 3-D coordinate systems to curves 
 and surfaces.
- atlas Palette - allows visualization of differential geometry 
 objects, manipulate its parameters, generate atlas code 
 and more...
- atlas 2D/3D Wizard - powerful GUI AddOn for atlas package 
 code generation.

***FEATURED LESSON PLAN
Lesson Plan: Math Forum Teacher Packet: TI-PoW: Caliyah's Cart
http://mathforum.org/mathtools/lesson/161766/
Max Ray
This packet contains a copy of the original problem used to 
create the activity, rationale and explanation behind the 
"Change the Representation" focal activity, and some thoughts 
on why this activity works well with TI-NspireTM technology.

***FEATURED LESSON PLAN
Lesson Plan: Math Forum Teacher Packet
TI-PoW: Chirp! Chirp! [I Notice, I Wonder]
http://mathforum.org/mathtools/lesson/161767/
Max Ray
This packet contains a copy of the original problem used to 
create the activity, rationale and explanation behind the 
"I Notice, I Wonder" focal activity, and some thoughts on why 
this activity works well with TI-NspireTM technology.

***FEATURED LESSON PLAN
Lesson Plan: Math Forum Teacher Packet
TI-PoW: Chirp! Chirp! [Doing it Wrong]
http://mathforum.org/mathtools/lesson/161768/
Max Ray
Description: This packet contains a copy of the original 
problem used to create the activity, rationale and explanation 
behind the "Doing it Wrong" focal activity, and some thoughts 
on why this activity works well with TI-NspireTM technology.


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   The Math Forum @ Drexel -- 30 March 2012