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Learners follow a three-step process to start their own rock collection.

In this activity, learners work in teams to study the observation skills essential to scientific research.

In this activity, learners create three-dimensional shapes by making some origami models of simple boxes and containers.

In this activity, learners use their imaginations and picture a scene in their heads.

In this outdoor archaeology activity, learners use mathematical skills and scientific inquiry to generate and process information from their own excavation site.

In this activity, learners start their own field journal to better understand the wildlife in their area.

This activity has three story puzzles learners can solve to learn about life in the Arctic.

In this activity, learners interpret three trackways and use measurements and a formula to infer the relative speed of dinosaurs.

Learners construct a bird feeder from re-used materials. After hanging their feeder, they keep a journal about what birds visit the feeder.

In this experiment, learners examine how pressure affects water flow. In small groups, learners work with water and a soda bottle, and then relate their findings to pressure in the deep ocean.

In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.

In this activity, learners map their world by drawing a plan of their bedroom.

In this activity, learners work in teams to simulate the process used by Global Positioning Systems (GPS) to determine the location of a fallen meteorite in Antarctica.

In this nighttime, outdoor activity, learners keep a record of what they see in the sky by drawing constellations, the Moon, and making note of the weather and conditions each day.

Learners compare a life-size drawing of a Tyrannosaurus rex head and a full-size Sinornithosaurus body to understand that dinosaurs varied in size.

In this activity, learners discover the importance of maps and scale as they work together to create a map of the classroom.

This activity helps learners understand how the angle of the Sun affects temperatures around the globe.

Using simple, inexpensive items, learners build and test submarine models.

Learners observe two model atmospheres -- one with normal atmospheric composition and another with an elevated concentration of carbon dioxide.

In this activity about cartography, learners work in teams to create two different map projections: a planar (or polar) and a cylindrical (or Mercator) projection.