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In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods.

In this activity, learners are challenged to calculate their own weight on various planets using a scale and calculator. Older learners may be challenged to do so without using calculators.

In this math lesson, learners explore and investigate measurement using standard and non-standard units.

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