MATH TOOLS NEWSLETTER - FEBRUARY 3, 2007 - No. 48 As you browse the catalog, please take a moment to rate a resource, comment on it, review it -- or start a new discussion! ***FEATURED TOOL Thinking Blocks - Ratio Word Problems Colleen King http://mathforum.org/mathtools/tool/29180/ Thinking Blocks teaches students in grades 4 - 6 how to model and solve multistep word problems dealing with ratio and proportion. ***FEATURED TOOL Construct a 45 degree angle with compass and straightedge Math Open Reference - John Page http://mathforum.org/mathtools/tool/28935/ An interactive applet and associated web page that show how to construct a 45 degree angle with a compass and straightedge. The animation can be single-stepped or run as a continuous movie. ***FEATURED ACTIVITY Worksheet - Perpendicular Line Bisector Math Open Reference - John Page http://mathforum.org/mathtools/activity/28857/ A printable worksheet with 3 related problems to practice how to bisect a line using only a compass and straightedge. Suitable for class handout or homework. ***FEATURED DISCUSSION How to disconnect a piecewise graph http://mathforum.org/mathtools/discuss.html?&do=m&thread=pc__dd_tool__g-1 Betty14 asks, "How should I format the graph calculator (TI-83/83+/84+) in order to obtain a disconnected graph instead of getting a connecting graph throughout the domain of the function?" ***FEATURED DISCUSSION Advantages of Interactive Graphs http://mathforum.org/mathtools/discuss.html?&do=m&thread=___disc_13171_g-9 Aldana thinks out loud that "... presenting an interactive graph of two lines that represent displacement of two objects (runner) as time changes will open ... discussion and ... presentation of the following topics...." ***FEATURED DISCUSSION Linear Lasers/Using Math Tools http://mathforum.org/mathtools/discuss.html?&do=m&thread=a__h_tool__g-4 TAR states, "I know you can tell if they cost money, but wonder if there is a way to alert browsers that registration is required. Because of the volume of sites, I began looking at the ones that had been rated." 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 -- 3 February 2007