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 MATH TOOLS NEWSLETTER - March 18, 2011 - No. 96

***National Council of Supervisors of Mathematics (NCSM)
Visit us in Indianapolis, IN, at the National Council of
Supervisors of Mathematics 43rd Annual Conference,
April 11-13, 2011. 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)
Visit us in Indianapolis, IN, at the National Council of
Teachers of Mathematics (NCTM) Annual Meeting, April 14-16, 2011.
Stop by Booth 1243 in the Exhibit Hall, and attend our sessions.

***Summer C.A.M.P.
This summer, Groton School (Groton, Massachusetts) will be
hosting a program in complexity theory for high school
students. Offered in partnership with the Santa Fe Institute,
Complexity and Modeling Program (C.A.M.P.) is a novel immersion
program that introduces teens to complexity science scholarship.
Apply by March 31:


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: Finding Common Denominators
Conceptua Math
Teachers can use this tool to help students build conceptual
understanding of common denominators. By adjusting the models
of two fractions with uncommon denominators to show two
fractions with a common denominator, students experience the
understanding that to find a common denominator of two fractions
means to find equivalents that share the same denominator.
Teachers can also create examples in which students apply the
"one fraction" procedure with and without the support of the
models. The concept is developed through the use of a variety
of models that include pies, vertical bars, horizontal bars,
areas, sets and number lines.

Tool: Factor Tree
National Library of Virtual Manipulatives (Utah State University)
This manipulative allows you to construct factor trees (to the
prime factors) for two numbers, and then from the prime
factorization, you are asked to identify the Least Common
Multiple (LCM) and the Greatest Common Factor (GCF) of the two
given numbers.

Tool: Kali
Jeff Weeks
Kali lets you draw symmetrical patterns based on any of the 17
tiling groups. Kali does not assume the user knows how to read,
so even the youngest children can enjoy it. Older students can
systematically explore the wallpaper, frieze and rosette groups.
The command "Show Singularities" and the Conway and IUC notation
provide support for a theoretical analysis. Freely available for
both Windows and Macintosh computers.

Tool: Wash Line
Hang the numbered shirts on the line in order. Choose from
numbers 1-5, odds or evens to 10, or a selection to 20.

Tool: FooPlot - Online graphing calculator and plotter
Dheera Venkatraman
This tool lets you plot functions, polar plots, and 3D with just
a suitable web browser (within the IE, FireFox, or Opera web
browsers), and find the roots and intersections of graphs. In
addition, you can easily plot any function simply by putting it
after the URL; for example,

Tool: Primitives
Alec McEachran
Primitives is a small Flash application for visualizing numbers
in terms of their prime factors.

Tool: Counting Using Money
Designed to assess or reinforce children's understanding of
number sequence and counting to 10, this activity can also
introduce addition by using coins to support the
counting activity.

Technology PoW: Train Trouble
Claire Mead
How fast is the train moving to allow Herman and Sheila to each
escape the tunnel? 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--see this page for details.


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       The Math Forum @ Drexel -- 18 March 2011