Third grade: balancing forces
In the Balancing Forces unit, students work to investigate and then explain how inventions seem to defy logic. Over the course of the unit, through firsthand experiences, discourse, and reading and writing informational text, students will come to understand how forces can cause stability or change in an object’s motion. They will discover how magnetic force can be used to counterbalance the force of gravity. They will create physical models, diagram models, and write, and present scientific explanations detailing how the maglev (magnetic levitation) train appears to defy gravity by floating.
Fourth grade: energy conversions
In the Energy Conversions unit, students take on the role of systems engineers for Ergstown, a fictional town that experiences frequent blackouts, the anchor phenomenon for the unit. Throughout the unit, they explore reasons why an electrical system may fail. Through firsthand experiences, discourse, reading, writing, and engaging with a digital simulation, students make discoveries about the way electrical systems work. Then, students apply what they have learned as they choose new energy sources and energy converters for the town, using evidence to explain why their choices will make the electrical system more reliable. As they work to solve the problem of blackouts in Ergstown, students will use and construct devices that convert energy from one form to another, build an understanding of the electrical system, and learn to identify energy forms all around them.

Fifth grade: patterns of earth and sky
Humans have been observing the Moon, the stars, and other objects in space and recording their observations for many years. Observing and recording the apparent patterns of movement of the Moon, the sun, and other stars has allowed people to track and mark the passage of time for millennia. In this unit, students take on the role of astronomers, helping a team of archaeologists at the fictional Museum of Archaeology. Students are asked to figure out and explain the significance of the illustrations on a recently discovered thousand-year-old artifact with a missing piece, the anchor phenomenon for the unit. Students observe and investigate patterns in the sky by day and by night with kinesthetic models and informational text. They learn that stars are all around us in space, develop an understanding of scale and distance in the universe, and discover how the spin and orbit of our planet causes us to observe daily and yearly patterns of stars. Students apply their understanding of why we see different stars at different times to explain what is shown on the artifact, and what might be on the missing piece.