Astronomy
The students begin the unit by observing the properties on Earth that make it possible for life to survive on it in comparison to other planets and celestial objects. This sets the stage for students to investigate the relationship between Earth and the Sun and the properties of that relationship that make it possible for the survival of life as we know it. Students observe how the Sun, the Moon, other celestial bodies, and the patterns of celestial events are a part of their everyday lives. They also investigate how the properties of light affect what they see. Through guided presentations and exploration, students learn about the repeating patterns of celestial events. Hands-on modeling is reinforced with readings that provide explanations of observed phenomena.

Electricity and Magnetism
The students begin the unit by exploring static electricity and observing how electricity is a part of their everyday lives. This sets the stage for students to investigate how electricity produces the light, sounds, etc. that they observe. Through exploration, students learn what is necessary for a working electrical circuit. Students explore magnetism in order to gain insight into how electricity and magnetism are related. The students begin by exploring the properties of magnets and observe how magnets affect everyday objects. Students explore the relationship between electricity and magnetism and build an electromagnet. Hands-on learning is reinforced with readings that provide explanations of the observed phenomena.

Structures
Children investigate structures and their strength. They observe structures in the school neighborhood and record the variety of sizes, shapes, materials, and functions of these structures. They build structures with straws, index cards, and additional classroom materials. The unit was developed by the Education Development Center, Inc., with funding from the National Science Foundation. (Note: This unit will not be used after the 2007-2008 school year.)