ruler

This clip shows a little boy have his height measured, something his…

In this clip, a father explains to his son how measurements work,…

In this clip, a father shows his son a yardstick, then they practice…

In this clip, a boy measures various objects in a kitchen as his father…

In this clip, a boy measures things using the length of his hand and…

This clip shows two boys looking at a model o a house as well as its…

In this clip, two boys work on a model of a house and a blueprint, here…

In this clip, two boys work on adding a component to a model of a house…

Ohio: Begins with a woman removing a pie from the oven. Quick shots of…

Middle aged teacher in 1960s clothes and cat eye glasses stands at the…

Hands operating and demonstrating the use of a slide rule.