Chemistry
Acid-Base Solutions
Compare strong and weak acids and bases in solution.
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Ratio and Proportion
Move hands to match ratios and build a feel for proportional reasoning.
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Simulation by PhET Interactive Simulations, University of Colorado Boulder. LearnHive curates the catalog and supporting study material.
Explore the simulation and note what changes when you adjust one variable.
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Math
Area Builder
Build shapes to explore area and perimeter.
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Area Model Algebra
Multiply polynomials using an area model.
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