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```   MATH TOOLS NEWSLETTER - February 28, 2012 - No. 106

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resource, comment on it, review it -- join an existing
conversation, or start a new discussion!

***FEATURED TOOL
Tool: Buffon's Needle
http://mathforum.org/mathtools/tool/222/
Shodor: Project Interactivate
Students experiment with a simulation to get an approximation of Pi.

***FEATURED TOOL
http://mathforum.org/mathtools/tool/159528/
Max Ray
Students write what they notice and wonder about a midpoint

***FEATURED TOOL
Tool: ClassTimer
http://mathforum.org/mathtools/tool/160009/
Ventura Educational Systems
ClassTimer helps students visualize time and understand it as a
fundamental concept that needs to be managed in order to be more
productive. In addition to the digital time display, ClassTimer
includes a bar graph style display so that young children can
visualize the time remaining for a particular task.

***FEATURED TOOL
Tool: Number Grid Level 5
http://mathforum.org/mathtools/tool/25844/
Quincy Brown
Fifth level in a collection of five Number Grid activities. It
displays a section of a matrix containing a set of consecutive
whole numbers. A move from one number to the next within a row is
a change of one; a move from one number to the next within a column
is a change of ten. Level 5 uses three and four digit numbers.

***FEATURED TOOL
Tool: Volume
http://mathforum.org/mathtools/tool/95285/
BBC: Skillswise
This module is about finding out how to work out volumes, using
factsheets, worksheets, and a quiz at three levels of difficulty.

***FEATURED TOOL
Tool: Drawing Hyperbola
http://mathforum.org/mathtools/tool/627/
International Education Software: Manipula Math
Interactive page to draw hyperbolas.

***FEATURED TOOL
Tool: Hands-On Math: Line Design
http://mathforum.org/mathtools/tool/160014/
Ventura Educational Systems
Hands-On Math LineDesign is an interactive learning environment
where students can explore and discover the fundamental ideas of
geometry. Encourage students to explore, discuss their findings
and use math vocabulary while creating designs. Younger learners
may use terms such as line, line segment, end point, intersection,
rectangle, square, circle, and triangle. For older students,
teachers may want to use some of the options available by tapping
the grid icon. Based on the shape selected, either a rectangular or
polar coordinate graphic system is displayed.

***FEATURED TOOL
Tool: NASA New Start Index Inflation Calculator
http://mathforum.org/mathtools/tool/133366/
NASA
This is an inflation calculator for adjusting costs from one year to
another using the NASA New Start Inflation Index. This inflation
calculator is based on the inflation rate during the US Government
Fiscal Year, which begins on October 1 and ends on September 30.
This calculator computes inflation from 1959 to 2020.

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