Students examine what lies within the Earth. They research and create scale models illustrating the layers of the Earth and write skits advocating a travel plan to send a probe into the Earth's mantle.

Otis Boykin was a successful African American inventor whose inventions include resistors for electrical equipment and missiles, a controller for pacemakers, and a burglar-proof cash register.

One-page overview of pacemakers includes detailed labeled diagrams of the heart and implantable pacemaker along with essential information on how to live with one.