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In this math lesson, learners count and compare amounts of money less than or equal to one dollar.

In this activity, learners build a game that tests their steadiness. Learners construct the game board by setting up an electrical circuit and a wand.

This outdoor activity/field trip requires a place where minnows swim, such as a local pond or brook.

In this activity, learners build a carousel toy that spins when pushed down.

In this math lesson, learners use a variety of manipulatives to explore spatial relationships of squares and their transformations.

In this design challenge, learners will create wind-powered contraptions to transport a load, such as a cupcake or another small object, and test to see if they work.

In this environmental science lesson, learners will examine the dangers of mercury and how humans contribute to growing mercury emissions on Earth.

In this two part activity, learners become draft detectives by constructing their own draft catchers to detect drafts around windows or doors.

Learners take on the role of environmental engineers as they design water filters.

In this activity, learners investigate color vision as well as plan and conduct their own experiments.

In this arts and crafts activity about animals and animal characteristics, learners will design animal hats and role-play as animals.

In this activity (on pages 18-29) learners explore the impact of the March 24, 1989 oil spill in Alaska caused by the Exxon Valdez tanker.

In this design challenge, learners will use microbes to design and grow a custom biomaterial at home and make something creative with it.

In this activity, learners use their imaginations and experiment with different materials to create bug hats.

In this chemistry activity, learners use guar gum to make slime. Use this activity to introduce learners to polymers, viscosity, and colloids.

In this activity, learners explore the engineering design process (EDP)—the process engineers use to solve design challenges.

In this activity, learners explore how packaging engineers develop customized shipping and packaging containers to meet the needs of many different industries.

In this activity learners observe mold growth on different types of bread by measuring and recording the growth rate.

In this math lesson, learners compare products to determine the best product.

In this drawing/mapping activity, learners design plots of land while incorporating positive strategies for improving water quality.