Pettiford, Rebecca

Describes how lifeguards keep swimmers safe at the pool and on the beach.

Describes the work garbage collectors do in our communities.

Introduces the world's most amazing dams while explaining the engineering behind their creation.

Presents a simple introduction to the work school crossing guards do, the tools they use, the clothing they wear, and their importance to the communities they serve.

Explains how coaches teach kids skills they need to play sports.

Introduces the world's most amazing bridges while explaining the engineering behind their creation.