"The lever of the first class has the fulcrum between the power and the weight." Examples: a common crowbar, a pump handle, scissors, a seesaw. -Foster, 1921

First Class Lever

"The lever of the first class has the fulcrum between the power and the weight." Examples: a common…

Geometric pattern for translation and rotation exercises.

Geometric Block Pattern 48

Geometric pattern for translation and rotation exercises.

This sign is used to indicate that a playground is located nearby.

Playground, Black and White

This sign is used to indicate that a playground is located nearby.

This sign is used to indicate that a playground is located nearby.

Playground, Color

This sign is used to indicate that a playground is located nearby.

This sign is used to indicate that a playground is located nearby.

Playground, Outline

This sign is used to indicate that a playground is located nearby.

This sign is used to indicate that a playground is located nearby.

Playground, Silhouette

This sign is used to indicate that a playground is located nearby.

Two small children playing on seesaw.

Seesaw

Two small children playing on seesaw.

A boy and a girl playing on a seesaw.

Seesaw

A boy and a girl playing on a seesaw.

An illustration of a woman and boy sitting on a seesaw made from a wooden board and log.

Woman & Boy on Seesaw

An illustration of a woman and boy sitting on a seesaw made from a wooden board and log.