Stead, Tony.

What is the most important invention? / by Mrs. Gaston's class with Tony Stead. - North Mankato, Mn. : Capstone Classroom, c2015. - 24 pages : color illustrations ; 24 cm. - What's your point? . - What's your point? .

Illustrations created by Mrs. Gaston's class.

"We depend on inventions to live in the 21st century, such as washing machines and smoke detectors, but which one is the most important invention? This fourth grade class looks at nine inventions and argues why each is the most important. Read this book to help you decide: What is the most important invention?"--Back cover.

Grade 4.

ISBN: 9781625218896 (tr. pbk.)

Subjects--Topical Terms:
Debates and debating.
Inventions.
Public opinion.