Curated OER
If You Bit A Rock
Students describe the physical characteristics of a familiar model and apply it to an unfamiliar one. In this investigative lesson students become familiar with rock characteristics by participating in a candy bar activity.
CK-12 Foundation
Ck 12: Earth Science: Igneous Rock Classification
[Free Registration/Login may be required to access all resource tools.] Presents the classifications of igneous rocks based on silica content.