MATH TOOLS NEWSLETTER - July 23, 2010 - No. 89 ***Numeracy and Financial Literacy Summer Institute http://mathforum.org/fl/institute2010/ The Math Forum invites teachers of 6th-12th grade mathematics to participate online. Apply here by July 27: http://mathforum.org/fl/online.html ***Math Forum Online Course Moving Students from Arithmetic to Algebra...one step at a time http://mathforum.org/pd/movingstudents/ July 29 - August 13, 2010 (2 week intensive) Registration closes at 5 pm ET on Tuesday, July 27, 2010. \|/ 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 TOOL Tool: Broken Calculator http://mathforum.org/mathtools/tool/97212/ Duncan Keith Eric's calculator has lost most of its keys. Can you find a way for the leftover keys to generate the target numbers? ***FEATURED TOOL Tool: Conic_Connections http://mathforum.org/mathtools/tool/98098/ Kent Thele Manipulate a plane and double-napped cone to generate graphs and equations of conic sections. Eccentricity, foci, and directrices are also illustrated in both 2- and 3-D. ***FEATURED TOOL Tool: Integer Multiplication http://mathforum.org/mathtools/tool/97159/ Brainingcamp Interactive Math Visual models show how integer multiplication can be thought of as repeated addition or subtraction. Investigate how the sign of the factors determines whether the product is positive or negative. ***FEATURED TOOL Tool: Counting Steps http://mathforum.org/mathtools/tool/96941/ Wayne Allen Bateman Trace paths through this addition grid counting puzzle using exactly the number of steps shown on the point you choose. ***FEATURED TOOL Tool: Box Plot Lesson and Virtual Manipulative http://mathforum.org/mathtools/tool/97157/ Brainingcamp Interactive Math The Box and Whisker Plot lesson includes visuals and audio narration. A virtual manipulative lets users enter and modify a data set and see the box plot update in real time. A question set can be used for basic assessment. ***FEATURED TOOL Tool: Diagonal Differences http://mathforum.org/mathtools/tool/97202/ Duncan Keith This tool arranges the numbers 1 to 64 in an 8x8 grid, then outlines a 3x3 square within that grid. Multiply the diagonal corners, then take the difference of your results. Is that difference the same for any 3x3 square within this grid? What about different sizes of grid and square? Can you find a pattern? ***FEATURED TECHNOLOGY POW Technology PoW: Beat the Odds? http://mathforum.org/mathtools/tpow/97416/ Carol Speck Can you beat the odds and always choose the right door? 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. 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 -- 23 July 2010