What is the meaning of Elementary_school?

A school for children, typically older than toddlers and younger than adolescents. In the U.S., elementary schools cover grades 1 through 5, and the ages of the children are usually 6-11 years. At a minimum, elementary schools will teach basic reading, writing, arithmetic, and history.

A children's school for grades 1 to 6 (a continuation of preschool). It is succeeded by junior high school.

Source: wiktionary.org