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In this activity, learners explore how spring scales work and how they are used for non-exact weight measurement.

In this geography investigation, learners use a nighttime satellite image to observe areas of light across the United States and to identify patterns and spatial distributions of human settlements.

In this activity, learners explore how engineers incorporate biometric technologies into products as well as the challenges of engineers who must weigh privacy, security and other issues when designin

In this activity, learners explore how engineers have met the challenge of keeping foods, liquids, and other items cool.