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   MATH TOOLS NEWSLETTER - JANUARY 2, 2009 - No. 71

 Happy New Year! We are hoping that the new year brings many
 interesting discussions to Math Tools. Feel free to start a
 new discussion of your choice or join one of them already
 in progress.

 ***ONLINE PROFESSIONAL DEVELOPMENT WORKSHOPS (free)
 For teachers of students in grades 5-9, we offer
 online workshops:

   Technology and Algebraic Reasoning
   http://mathforum.org/nsdl_mathtech/online/

   Tools for Thinking about Probability
   http://mathforum.org/nsdl_mathtech/online/prob.html

 The application deadline for our next sessions is
 Monday, January 5.

 The $100 workshop fee is currently covered by a grant from
 the National Science Foundation.

 ***FEATURED DISCUSSION
 Introduce of Graphoon (web based drawing service)
 http://mathforum.org/mathtools/discuss.html?&do=m&thread=_____g-145
 Makoto wrote, "I developed web based drawing service, Graphoon.
 You can draw line by formula (x^2, -2*x-3 ...) and some shapes
 (triangle, circle...) on cartesian graph. Please input by way
 of experiment as 'plot x.'"

 ***FEATURED DISCUSSION
 New Online Stopwatch Tool
 http://mathforum.org/mathtools/discuss.html?&do=m&thread=___disc_2971_g-1
 chronme announces, "Easy tool to record time spent on
 each exercise..."

 ***FEATURED TOOL
 Tool: Free Ride
 http://mathforum.org/mathtools/tool/70643/
 NCTM: Illuminations
 This applet allows you to vary the gear ratio of a bike. The
 distance traveled by a half-pedal is determined by the ratio
 of gears. Can you capture all five flags on a course?

 ***FEATURED TOOL
 Tool: Coin Toss
 http://mathforum.org/mathtools/tool/70764/
 Shodor: Project Interactivate
 Simulation of a coin toss allowing the user to input the
 number of flips, thereby exploring experimental and theoretical
 probabilities. Toss results can be viewed as a list of
 individual outcomes, ratios, or table.

 ***FEATURED TOOL
 Tool: Single Fraction Pointer
 http://mathforum.org/mathtools/tool/70750/
 Shodor: Project Interactivate
 Graphically determine the value of a given fraction
 represented as a point on a number line. Graphically find
 a fraction whose value is the given fraction using an arrow
 on the number line as a guide. Single Fraction Pointer is
 one of the Interactivate assessment explorers.

 ***FEATURED TOOL
 Tool: Derivate
 http://mathforum.org/mathtools/tool/70754/
 Shodor: Project Interactivate
 Begin understanding the meaning of the derivative at a point
 on a function. View the graph and the equation of the line
 tangent to any function at any point on the function.

 ***FEATURED TOOL
 Tool: Algebra Four
 http://mathforum.org/mathtools/tool/70753/
 Shodor: Project Interactivate
 Students play a generalized version of connect four, gaining
 the chance to place a piece on the board by solving an
 algebraic equation. Parameters: Level of difficulty of
 equations to solve and type of problem. Algebra Four is
 one of the Interactivate assessment games.

 ***FEATURED ACTIVITY
 Activity: Converting between Fractions, Decimals, and Percents
 http://mathforum.org/mathtools/activity/70638/
 Victoria Miles
 By sliding a lever, students can change the numerator and
 denominator of a fraction. In the process, students will be
 able to make connections between numerator or denominator
 size and fraction size. Students will see instant equivalent
 forms of a number, and will begin to see a relationship
 between fractions, decimals and percents.

 ***FEATURED ACTIVITY
 Activity: Exploring Tessellations
 http://mathforum.org/mathtools/activity/70640/
 Victoria Miles
 Although it could be argued that the best way for students
 to explore tessellations is by using pattern blocks, the
 virtual pattern blocks in this NLVM applet will engage your
 students, too. In this activity, students will understand
 which shapes or combinations of shapes will tessellate,
 and why.

          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/

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      The Math Forum @ Drexel -- 2 January 2009