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. CHECK OUT THE MATH TOOLS SITE: Math Tools http://mathforum.org/mathtools/ Register http://mathforum.org/mathtools/register.html Discussions http://mathforum.org/mathtools/discuss.html Research Area http://mathforum.org/mathtools/research/ Developers Area http://mathforum.org/mathtools/developers/ Newsletter Archive http://mathforum.org/mathtools/newsletter/ \`. .--------------.___________) \ |//////////////|___________[ ] `--------------' ) ( The Math Forum @ Drexel -- 4 September 2009