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In this activity, learners construct possible food webs for six different ecosystems as they learn about the roles of different kinds of living organisms.

In this activity (on page 142 of the PDF), learners will compare breathing rates before and after hyperventilation to explore how reduced carbon dioxide levels in the blood lower the need to breathe.

Learners investigate how drag affects the falling rate of objects.

In this activity, learners construct a cereal chain as a model of how proteins are made in the cell.

In this activity, learners simulate whale echolocation. Learners experience echolocation by wearing blindfolds, while another learner makes snapping noises in front of, behind, or to the side of them.

In this activity, learners examine raindrop bottles (prepared ahead of time) to observe in slow motion the behavior of falling droplets and explore concepts such as drag and terminal velocity.

In this activity, learners observe the effect of transpiration as water is moved from the ground to the atmosphere.

In this activity, learners create their own bird species using arts and crafts materials. The bird call recordings are not online so the introduction activity can't be done, but everything else can.

In this activity, learners perform an experiment that models a chromatography-like process called electrophoresis, a process used to analyze DNA.

In this math activity, each learner creates a book about themselves using a template. Learners discuss the different parts of the body and practice measuring their body parts using crayons.

Learners create an Incan counting device called a quipu (pronounced kee-poo).

This activity focuses on interactions within Earth systems and the effects of human activities. In this activity learners build a biomass pyramid.

Learners examine what happens when a tube spins in two directions at once. They push on a cardboard tube causing it to spin along its length while at the same time turning from end-to-end.

In this physics activity (page 8 of the PDF), learners will explore the concept of inertia by attempting to run and stop quickly.

In this activity about how the body regulates blood pressure (page 117 of the PDF), learners make and compare measurements of heart rate and blood pressure from three body positions: sitting, standing

In this activity, learners explore the etymology of dinosaur names.

Learners determine the surface area and volume of two identical boxes, and then figure out the dimensions of a cubical box with the same volume.

In this three part activity, learners explore and experiment with shadows to learn about the Sun's relative motion in the sky.

In this introductory activity, learners discover that sugar and food coloring dissolve in water but neither dissolves in oil.

Learners make their own simple slide rules out of paper and learn how they work.