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Fire Simulate the spread of a wildfire using aprobability applet.
Electronic Abacus Explore an abacus model for representing numbers and performing addition.
Electronic Abacus Explore an abacus model for representing numbers and performing addition.
Equivalent Fractions Create equivalent fractions by shading squares and circles.
Deep Sea Duel Play a strategy game that requires you to select cards with a specified sum before your opponent
Distance to Horizon Investigate the relationship between your height above the Earth and the distance you can see to the horizon.
Concentration Play a matching game with different representations of equivalent items match quantities to their numerals, shapes to their names, or fractions to decimals and percents.
Circle Grapher Create a customized circle graph with your own data, or display a circle graph from an included set of data.
Computing Pi Compare two methods for computing pi.
Circle Tool Compare the circumference and area of a circle to its radius and diameter.
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