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   MATH TOOLS NEWSLETTER - SEPTEMBER 4, 2009 - No. 79

 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 DISCUSSION
 Mathematical collaboration tools
 http://mathforum.org/mathtools/discuss.html?&do=m&thread=_____dev-74
 karajo wonders, "Is there some conference / whiteboard
 tool that includes equation editors, geometry support,
 latex support, etc.?"

 ***FEATURED DISCUSSION
 math fair project
 http://mathforum.org/mathtools/discuss.html?&do=m&thread=_____round-136
 frexxx explains, "I want to join the math fair project
 competition in our division with my students. I just want
 to get some project ideas in math [which] I can suggest to
 my students for their entry. Please give me some ideas
 where we can concentrate and develop."

 ***FEATURED SUPPORT MATERIAL
 Support Material: Hypotrochoid
 http://mathforum.org/mathtools/support/86756/
 Math Images
 This Math Images page catalogs the hypotrochoid, along
 with a basic description, mathematical explanations,
 related links, and references.

 ***FEATURED TOOL
 Tool: Math Images Tool: Hypotrochoid
 http://mathforum.org/mathtools/tool/86754/
 Steve Lombardi
 There are three subgroups within the Hypotrochoid family.
 The point P can be in three different general locations in
 relation to the rolling circle: inside, outside, or on the
 edge. The user of this applet can change the radius of the
 inner and outer circles as well as the distance of point P
 to the center of the circles.

 ***FEATURED TOOL
 Tool: Function graphing tool - Math Open Reference
 http://mathforum.org/mathtools/tool/86519/
 John Page
 A free web-based function graphing tool. Graph up to three 
 different functions on the same axes. Functions can refer 
 to up to three independent variables controlled by sliders. 
 As you move the sliders, the graphs change in real time to 
 reveal the effects of the variables.

 ***FEATURED TOOL
 Tool: Mini-Movies for your SMARTBoard
 http://mathforum.org/mathtools/tool/85584/
 Jamie Tubbs
 A SmartBoard mini-movie is a simple, interactive animation 
 for teachers to download and insert into their SMART 
 Notebook presentations. Most of these dynamic Flash files
 require only a click of the mouse, similar to the same 
 files that are already included in SMART Notebook's 
 resources. Currently, the library of math related mini-
 movies include ones on geometry, basic algebra, number 
 concepts, probability, patterns, and addition/subtraction.

 ***FEATURED ACTIVITY
 Activity: A Min/Max Problem
 http://mathforum.org/mathtools/activity/86120/
 Pat Ballew: Explorations in Geometry
 A guided exploration, using Geometer's Sketchpad, of the
 area of a triangle formed between two fixed rays, using a
 third ray with a movable end point.

 ***FEATURED ACTIVITY
 Activity: Geometry Quickies #1
 http://mathforum.org/mathtools/activity/85572/
 Pat Ballew: Explorations in Geometry
 The activity based around medians in this series may
 generate some questions. Here is a further exploration of
 the topics it raised, again with reference to
 Geometer's Sketchpad.

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  The Math Forum @ Drexel -- 4 September 2009