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In this activity, learners explore accuracy and precision.

In this design challenge activity, learners build a shock-absorbing system that will protect two “astronauts” when they land.

The goal of this activity is to design the fastest sailboat or one that carries the most treasure.

In this activity, learners review the history of gumball machines and explore potential and kinetic energy, while working in teams to build a gumball slide.

In this activity, learners build scaled-down structures and cantilevers in a series of "building out" challenges with bamboo skewers and tape.

In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.

This activity (on pages 24-29) combines science and art to introduce learners to how different animal pollinators spread pollen from one plant to another, and how certain shapes, colors, and smells of

This lesson focuses on surface area and how the shape of sugar crystals may differ as they are grown from sugars of different coarseness.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

In this activity, learners explore how product design differences can affect the success of a final product -- in this case a bag for holding candy.

In this activity, learners model directed evolution by making paper fly. Learners construct and fly paper airplanes.

In this activity, learners will imagine the challenges and opportunities of asteroid mining.

This activity (on page 2 of the PDF under SciGirls Activity: Lift Off) is a full inquiry investigation into the engineering challenges of sending scientific sensors into space.

In this activity, learners are challenged to design, build and test a birdhouse that will stay cool in the sun.

In this activity, learners explore how wind energy can be generated on both a large and small scale.

This activity (on page 2 of the PDF SciGirls Activity: Milk Carton Boat) is a full inquiry investigation into boat hull design.

In this activity, learners build large-scale structures and cantilevers in a series of "building out" challenges with garden poles and tape.

In this lesson, learners develop a robot arm using common materials. Learners explore design, construction, and teamwork, as well as materials selection and use.

In this activity, learners design a therapeutic agent to image and/or cure various diseases in the respiratory system.