age grade

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Salem Witch Trials. Photogravure after the painting by Walter McEwen titled - The Witches - circa 1890s.

How Rye Bread May Have Caused the Salem Witch Trials

Nelson Mandela, undated photo.

15 Nelson Mandela Quotes

San Francisco, California/USA-1/18/20: Womens March at Civic Center marching with signs of political protest regarding equality also embracing 2020 presidential candidates and celebrating equality

How Does the U.S. Government Define the Difference Between a Protest and a Riot?

Middle East bee locator map

Are the Middle East and the Near East the Same Thing?

Close up of praying mantis walking on stone ground against a blurred background in Japan

6 Animals That Eat Their Mates

New York NY/ USA- November 23, 2018 Hordes of shoppers throng the Macy's Herald Square flagship store in New York looking for bargains on the day after Thanksgiving, Black Friday.

Why Is It Called Black Friday?

airplane in flight (plane, aircraft, flying)

7 Puzzling Plane Disappearances

age grade

sociology

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definition

In age set
…is usually known as an age grade.
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