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  MATH TOOLS NEWSLETTER - February 24, 2011 - No. 95

Moving Students from Arithmetic to step at a time
March 10 - April 20

Teaching Mathematics with The Geometer's Sketchpad(R)
March 28 - June 6

Problems of the Week Membership -- Getting Started
March 17 - 24


Programs using 'Excel VBA' to share with people
shakespeare1212 posts to an ongoing discussion, "I would like to 
check it out. What does it do? VBA has HUGE potential as a math 
training tool."

Language arts and reading / math
Ginny M asks, "I just got an ActivLearning board. Do you have 
a section on your site that has interactive capability?"

Factoring Quadratics
pacer4life adds to an ongoing discussion, "Doesn't anyone use 'X-marks 
the spot' out there? It's such an easy algorithm to use."


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!

Support Material: What Americans Are Really Paying for the 
  Things They Buy Most
Bloomberg Business Week
By adjusting for the inflation that occurred from 1980 to 2010,
this article reveals just how much the relative
cost of 35 consumer goods and services has increased -- or
decreased. Click through the slide show to see the change in real
dollars on everything ranging from milk and bread to haircuts and
doctor's visits.

Tool: Savings Calculator
Use this savings calculator to see how a consistent approach
to investing can make your money grow. Whether saving for a 
house, a car, or other special purchase, the savings calculator 
will help you determine the right amount to save on a regular 
basis to achieve your goal.

Tool: Distributions
Select grids with different numbers of outcomes, run some 
experiments, and look for patterns in the distributions. For 
each type of grid and for 128 chips, predict the number of 
chips on average that can be expected to land in each of the 
lettered outcomes.

Tool: Exploring Probability and the Monte Carlo Method 
   (Video Interactive)
This multimedia mathematics resource examines probability. A 
video illustrates how math is used to evaluate the danger of 
avalanches in the mountains of Alberta. An interactive 
component allows students to compare theoretical and 
experimental probabilities, as well as explore the Monte Carlo 
method. A probability print activity is also included.

Tool: Plinko Probability
PhET Interactive Simulations
Play Plinko and develop your knowledge of statistics. As the 
Plinko ball falls, it ricochets down a triangular grid of 
pegs. See the balls random walk through the lattice. Watch 
the histogram of final positions build up and approach the 
binomial distribution.

Technology PoW: How Many Cubes?
Stephen Weimar
Given the front view and side view of an arrangement of cubes, 
students are asked for the largest number of cubes that could 
have been used to make the arrangement, as well as the smallest 
number possible. A link to Space Blocks, a Java applet from the 
National Library of Virtual Manipulatives, is provided to help 
students think about the possible arrangements. 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.


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        The Math Forum @ Drexel -- 24 February 2011