When did people start to count?

By Phillip Moore

Subjects: Dureté, Juvenile literature, Readers, Matière, Counting, Astronauts, Families, Counting, juvenile literature, Ressources naturelles, Propriétés, Trees, African American families, Arbres, Ouvrages pour la jeunesse, Matter, Counting books, Natural resources, Hardness, Properties

Description: Simple text explores some different tools people use to count. Suggested level: junior.