From site:

Earthquakes, a scientific and physical phenomenon, affect our lives in many ways. In this project, students use Real-Time earthquake and volcano data from the Internet to explore the relationship between earthquakes, plate tectonics, and volcanoes.

Students will:

• Use Real-Time data to solve a problem.
• Study the correlation between earthquakes and tectonic plates.
• Determine whether or not there is a relationship between volcanoes and plate boundaries.

In textbook-style fashion, the student reads about types of rocks, how they change over time, and the rock cycle.  At the end of each chapter are well-illustrated interactive quizes on identifying rocks, rock transformations, and the rock cycle.  There is a test at the end of the material.

This is a textbook-style interactive of the earth’s structure, plate tectonics, boundaries and types of upheavals resulting from plate movement.  There is an interactive quiz at the end.  What makes this site stand out are the interactive illustrations of the earth’s structure and plate movement.