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

http://mathforum.org/blogs/emp/
Are you an elementary math specialist or a K-5 teacher
interested in conversations focused on developing your

***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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