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```       MATH TOOLS NEWSLETTER - JULY 11, 2008 - No. 65

As you browse the catalog, please take a moment to rate a
resource, comment on it, review it -- start a new discussion,
or join an existing conversation!

***FEATURED TOOL
Tool: Training spatial visualization: the trip-lets 3D game
http://mathforum.org/mathtools/tool/49615/
Humberto Jose Bortolossi and Rogerio Vaz de Almeida Jr.
This applet is a 3D game to train spatial visualization.
The user must rotate a 3D solid and identify three letters
that make an English word.

***FEATURED TOOL
Tool: Graphing Calculator | Derivative Calculator | Equation Solver
http://mathforum.org/mathtools/tool/48085/
Amir Rashedi
This calculator graphs functions, parametric curves and equations
in Cartesian or polar coordinate systems. It also calculates
derivatives and solves equations by finding roots of functions.

***FEATURED TOOL
Tool: Primitives
http://mathforum.org/mathtools/tool/49600/
Alec McEachran
Primitives is a small Flash application for visualizing
numbers in terms of their prime factors.

***FEATURED TOOL
Tool: Quintic Equation Calculator
http://mathforum.org/mathtools/tool/49338/
Brian Kieffer
This calculator computes real and complex roots for any
quintic polynomial. It applies the Newton-Raphson Method,
which iteratively finds an approximate root to the Quintic,
starting out with a random initial guess. Then it factors
the equation out to (x - r1)(ax4 + bx3 + cx2 + dx + e) and
then solves the left-over Quartic Equation for roots 2
through 5.

***FEATURED TOOL
http://mathforum.org/mathtools/tool/49339/
Brian Kieffer
This Calculator can solve Quartics (AX^4 + BX^3 + CX^2 +
DX + E = 0), Cubics (AX^3 + BX^2 + CX + D = 0) and
Quadratics (AX^2 + BX + C = 0)

***FEATURED DISCUSSION
new PC & Mac Green Globs, free site licenses for teacher education sites

***FEATURED DISCUSSION
Understanding D, S & T
Glenys writes, "By using this quick graphing applet, students
experiment with the variables and have an instant visual
representation [of distance, speed, and time]."

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