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Math Forum Internet News

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Registered: 3/1/05
Newsletter: Math Forum Internet News No. 17.7 (17 Feb 12)
Posted: Feb 17, 2012 12:00 PM
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17 February, 2012 Vol. 17, No. 7

THE MATH FORUM @ DREXEL INTERNET NEWS

Dr. Math FAQ: What Are Leap Years?
Math Teachers' Circle Workshops | Lipson's Lego Sculptures

***************************************************************
Learn, energize and connect at the
2012 T3(TM) International Conference, Chicago, IL,
TI's largest professional development event
for math educators from elementary through college.

http://education.ti.com/calculators/pd/US/International/2012/
***************************************************************

DR. MATH FAQ: WHAT ARE LEAP YEARS?

http://mathforum.org/dr.math/faq/faq.calendar.html

2012 is a leap year, so this month ends on Wednesday,
February 29th.

In the leap year of 1996, the Forum began a free ask-an-expert
service for math students and their teachers. Since then, Ask
Dr. Math has helped millions understand why some years have 366
days, plus lots more mathematics about calendars, including

- how to take leap years into account when reasoning the day
of the week one year forward from any given date
- how to determine the day of the week for any date
- the surprising commonality of Friday the 13ths (2012 has
the maximum number, with two more to go)

-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-

PoW taking place: math problem-solving moment of the week

"The other thing I loved about this PoW was that when I was
reading the solutions I was really surprised by how many ways
there were to think about the problem. Silly me, I thought my
way was the obvious and only way... but of course I was wrong.
I loved reading all of the ways you thought of the problem,
and was really impressed that Student fourteen from Caughlin
Ranch Elementary School shared two different ways to solve
the problem!"

- Max, commenting on the Pre-Algebra PoW's Latest Solution

http://mathforum.org/pows/solution.htm?publication=4031

-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-

MATH TEACHERS' CIRCLE WORKSHOPS

http://www.mathteacherscircle.org/workshops.html

Apply now for the summer workshops "How to Run a Math Teachers'
Circle" and "Math Teachers' Circle Immersion."

Math teachers' circles put middle school math teachers in
regular contact with mathematicians to work collaboratively on
mathematical problem solving in the context of rich problems.

The deadline for these professional development opportunities,
run by the American Institute of Mathematics (AIM), is Friday,
16 March, 2012.

AIM recently posted some classroom-ready
problem-solving lessons:

- The Handshake Problem
- All Possible Diagonals
- Triangular Numbers
- Dots and Boxes
- Weird Multiplication

Freely download these PDFs, developed by James Tanton and other
master teachers, from here:

http://www.mathteacherscircle.org/resources/classroommaterials.html

-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-

Now taking place: math education conversation of the hour

"I feel very lucky to have gotten a great educator in high
school mathematics. In addition to teaching us the concepts,
formulas, and rules of mathematics, she listened to us in the
hallways and in class and even in the lunchrooms, and picked up
on some problems we experienced in our daily lives. She would
then utilize that in class, and mathematically model some of
the problems we experienced. In doing this, she even managed to
slip in some math that was not on the exams, which stuck with
me for the past 12 years."

- John, posted to the math-teach discussion

http://mathforum.org/kb/message.jspa?messageID=7670500

-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-

LIPSON'S LEGO SCULPTURES

http://www.ams.org/mathimagery/thumbnails.php?album=29

Self-described "professional nerd" Andrew Lipson has
constructed M.C. Escher drawings and other mathematical
forms -- out of Legos.

Lipson's Lego Sculptures is the latest Mathematical Imagery
album of the American Mathematical Society (AMS), which lets
you send images of his creations as e-postcards.

Have you constructed a mathematical form using Legos? The AMS
invites you to share a photo of it on Facebook:

http://www.facebook.com/amermathsoc

Other Mathematical Imagery albums of the AMS include

- shapes and tilings by Edmund Harriss
- simulated snowflakes by David Griffeath and Janko Gravner
- woven beads by Gwen L. Fisher
- origami by Robert J. Lang

For more of Lipson's brick-by-brick creations, check out
his site:

http://andrewlipson.com/mathlego.htm

-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-

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_o \o_ __| \ / |__ o _ o/ \o/
__|- __/ \__/o \o | o/ o/__/ /\ /| |
\ \ / \ / \ /o\ / \ / \ / | / \ / \

The Math Forum @ Drexel ** 17 February 2012

An archive of all the Math Forum newsletters
and directions for subscribing can be found at
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<head>
<title>The Math Forum Internet News</title>
</head>
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<td><font color="#333333" size="1" face="Verdana, Arial, Helvetica, sans-serif"><strong>17 February, 2012</strong></font></td>
<td><div align="right"><font color="#333333" size="1" face="Verdana, Arial, Helvetica, sans-serif"><strong>Volume 17 No. 7</strong></font></div></td>
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<p>
<font color="#003399" size="2" face="Verdana, Arial, Helvetica, sans-serif">
<strong>In This Issue</strong>
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<!-- Start - Table of contents -->

<p><font size="2" face="Arial, Helvetica, sans-serif">Dr. Math FAQ: What Are Leap Years?</font></p>
<p><font size="2" face="Arial, Helvetica, sans-serif">Math Teachers' Circle Workshops</font></p>
<p><font size="2" face="Arial, Helvetica, sans-serif">Lipson's Lego Sculptures</font></p>

<p>&nbsp;</p>

<p>
<img src="http://mathforum.org/pd/images/continuum.pd.jpg"; width=45><br />
<font color="#003399" size="2" face="Verdana, Arial, Helvetica, sans-serif">
<strong>Online PD</strong>
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If you prefer to receive a text-only version, please send a note to <a href="http://mathforum.org/electronic.newsletter/mfin.faq.html#feedback">the Math Forum Internet Newsletter editors</a> and we will subscribe you to that list.<br>
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</font>
</p><hr>
<p>
<font size="2" face="Arial, Helvetica, sans-serif">
<p><strong>
<font color="#003399">Dr. Math FAQ: What Are Leap Years?</font>
</strong>
</p>
<p align="center">
<a href="http://mathforum.org/dr.math/faq/faq.calendar.html">http://mathforum.org/dr.math/faq/faq.calendar.html</a>
</p>
<p>
2012 is a leap year, so this month ends on Wednesday,
February 29th.
</p>
<p>
In the leap year of 1996, the Forum began a free ask-an-expert
service for math students and their teachers. Since then, Ask
Dr. Math has helped millions understand why some years have 366
days, plus lots more mathematics about calendars, including
</p>
<ul>
<li>
how to take leap years into account when reasoning the day
of the week one year forward from any given date
</li>
<li>
how to determine the day of the week for any date
</li>
<li>
the surprising commonality of Friday the 13ths (2012 has
the maximum number, with two more to go)
</li>
</ul>
</font></p>

<hr>
<p><font size="2" face="Arial, Helvetica, sans-serif">
<p align=center>
<dl>
<dt>
<i><font color="#003399">PoW taking place: math problem-solving moment of the week</font></i>
<p>
<dt>
"The other thing I loved about this PoW was that when I was
reading the solutions I was really surprised by how many ways
there were to think about the problem. Silly me, I thought my
way was the obvious and only way... but of course I was wrong.
I loved reading all of the ways you thought of the problem,
and was really impressed that Student fourteen from Caughlin
Ranch Elementary School shared two different ways to solve
the problem!"
<dd>
- Max, commenting on the Pre-Algebra PoW's Latest Solution
<dd>
<a href="http://mathforum.org/pows/solution.htm?publication=4031">http://mathforum.org/pows/solution.htm?publication=4031</a>
</dl>
</p>
</font></p>
<hr>

<p><font size="2" face="Arial, Helvetica, sans-serif">
<p><strong><font color="#003399">Math Teachers' Circle Workshops</font></strong></p>
<p align="center">
<a href="http://www.mathteacherscircle.org/workshops.html">http://www.mathteacherscircle.org/workshops.html</a>
</p>
<p>
Apply now for the summer workshops "How to Run a Math Teachers'
Circle" and "Math Teachers' Circle Immersion."
</p>
<p>
Math teachers' circles put middle school math teachers in
regular contact with mathematicians to work collaboratively on
mathematical problem solving in the context of rich problems.
</p>
<p>
The deadline for these professional development opportunities,
run by the American Institute of Mathematics (AIM), is Friday,
16 March, 2012.
</p>
<p>
AIM recently posted some classroom-ready
problem-solving lessons:
</p>
<ul>
<li>
The Handshake Problem
</li>
<li>
All Possible Diagonals
</li>
<li>
Triangular Numbers
</li>
<li>
Dots and Boxes
</li>
<li>
Weird Multiplication
</li>
</ul>
<p>
Freely download these PDFs, developed by James Tanton and other
master teachers, from here:
</p>
<p align="center">
<a href="http://www.mathteacherscircle.org/resources/classroommaterials.html">http://www.mathteacherscircle.org/resources/classroommaterials.html</a>
</p>
</font></p>

<hr>
<p><font size="2" face="Arial, Helvetica, sans-serif">
<p align=center>
<dl>
<dt>
<i><font color="#003399">Now taking place: math education conversation of the hour</font></i>
<p>
<dt>
"I feel very lucky to have gotten a great educator in high
school mathematics. In addition to teaching us the concepts,
formulas, and rules of mathematics, she listened to us in the
hallways and in class and even in the lunchrooms, and picked up
on some problems we experienced in our daily lives. She would
then utilize that in class, and mathematically model some of
the problems we experienced. In doing this, she even managed to
slip in some math that was not on the exams, which stuck with
me for the past 12 years."
<dd>
- John, posted to the math-teach discussion
<dd>
<a href="http://mathforum.org/kb/message.jspa?messageID=7670500">http://mathforum.org/kb/message.jspa?messageID=7670500/</a>
</p>
</font></p>
</dl>
<hr>

<p><font size="2" face="Arial, Helvetica, sans-serif">
<p><strong><font color="#003399">Lipson's Lego Sculptures</font></strong></p>
<p align="center">
<a href="http://www.ams.org/mathimagery/thumbnails.php?album=29">http://www.ams.org/mathimagery/thumbnails.php?album=29</a>
</p>
<p>
Self-described "professional nerd" Andrew Lipson has
constructed M.C. Escher drawings and other mathematical
forms &mdash; out of Legos&reg;.
</p>
<p>
Lipson's Lego Sculptures is the latest Mathematical Imagery
album of the American Mathematical Society (AMS), which lets
you send images of his creations as e-postcards.
</p>
<p>
Have you constructed a mathematical form using Legos? The AMS
invites you to share a photo of it on Facebook:
</p>
<p align="center"><a href="http://www.facebook.com/amermathsoc">http://www.facebook.com/amermathsoc</a></p>
<p>
Other Mathematical Imagery albums of the AMS include
<ul>
<li>
shapes and tilings by Edmund Harriss
</li>
<li>
simulated snowflakes by David Griffeath and Janko Gravner
</li>
<li>
woven beads by Gwen L. Fisher
</li>
<li>
origami by Robert J. Lang
</li>
</ul>
<p>
For more of Lipson's brick-by-brick creations, check out
his site:
</p>
<p align="center"><a href="http://andrewlipson.com/mathlego.htm">http://andrewlipson.com/mathlego.htm</a></p>
</font></p>

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