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In this three/four-day lesson, learners calculate perimeters and areas and draw the castle plan to scale.

Build a catapult that transforms the potential energy of a twisted rubber band into kinetic energy. Experiment with design variations so that you can hit a target with a projectile.

This activity (located on page 3 of the PDF under GPS: Lava Flow Activity) is a full inquiry investigation into the relationship between an object’s mass and the distance it is thrown by a catapult.

In this dynamic activity, learners build a catapult that launches projectiles, such as marshmallows.