Add to ORKGThis Classroom Connectors lesson plan teaches students about the structure and composition of the Earth by describing and constructing a model of the Earth's layers. This site provides goals, objectives, an outline, time needed, materials, activities, and closure ideas for the lesson. Classroom Connectors address content with an activity approach while incorporating themes necessary to raise the activity to a higher cognition level. The major motivation is to employ instructional strategies that bring the students physically and mentally into touch with the science they are studying. Educational levels: Middle school