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        K-4,13+

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        Auditory, Visual

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        Part of WGBH
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        Setting up a Fair Experiment with Balls and Ramps

        Teacher Heidi Fessenden helps her first-grade students set up an experiment using marbles and ramps in this video segment from Teaching Elementary Physical Science. Her class explores the variables of the experiment and discusses how to control factors to make the experiment fair. She describes how the goal of the lesson is not to get perfect results, but to have her students go through the process of making observations, testing predictions, and noticing what may make the experiment unfair.

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