PHET Interactive Simulations: Proportion Playground
Topics
Ratios
Proportional Reasoning
Unit Rate
Description
Play with ratios and proportions by designing a necklace, throwing paint balloons, playing billiards, or shopping for apples! Make predictions about proportions before they are revealed.
Sample Learning Goals
Use a ratio as a descriptive characteristic
Compare the meaning of a ratio in different contexts
Use scaling to build proportions or find a missing value in a proportion
Simplify ratios to build proportions or find a missing value in a proportion
Use multiplicative reasoning to solve problems