Lloyd G. Douglas

Introduces pulleys and how they work to raise flags, as well as heavy objects.

Illustrations and text describe different examples of the use of simple machines known as levers.

A girl's class prepares for Memorial Day by learning about the holiday from their teacher and making flags, and later she goes to a war memorial with her father to honor those who died.

A young boy and his class learn about and prepare for Martin Luther King, Jr. Day.