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ComputingPi
Geometry

Computing Pi

6-8, 9-12
Compare two methods for computing pi in this applet.
FreeRide
Number and Operations

Free Ride

6-8, 9-12
Explore fractions using the context of a bicycle and gear ratios.
GraphCreator
Geometry

Graph Creator

6-8, 9-12
Use this vertex-edge tool to create graphs and explore them. Investigate ideas such as planar graphs, complete graphs, minimum-cost spanning trees, and Euler and Hamiltonian paths.
Concentration
Geometry

Concentration

Pre-K-2, 3-5

Play a matching game with different representations of equivalent items.

FiveFrame
Number and Operations

Five Frame

Pre-K-2
The four games that can be played with this applet help to develop counting and addition skills.
TenFrame
Number and Operations

Ten Frame

Pre-K-2
The four games that can be played with this applet help to develop counting and addition skills.
HowManyUnderTheShell
Number and Operations

How Many Under the Shell?

Pre-K-2
Use this tool to practice addition and subtraction with Okta, the octopus.
AreaTool
Geometry

Area Tool

6-8
Use this tool to determine how the length of the base and the height of a triangle, parallelogram, or trapezoid can be used to determine its area.
CompoundInterestSimulator
Algebra

Compound Interest Simulator

9-12
This applet will allow you to investigate savings account earnings, credit card debt, and a stock market simulation.
PrimaryKrypto
Number and Operations

Primary Krypto

Pre-K-2, 3-5, 6-8
Combine five number cards using the four arithmetic operations (+, –, ×, ÷) to arrive at a "target" number.