The women’s suffrage movement was a decades-long fight to win the right to vote for women in the United States.

It took activists and reformers nearly 100 years to win that right, and the campaign was not easy

August 18, 1920, the 19th Amendment to the Constitution was finally ratified, enfranchising all American women and declaring for the first time that they, like men, deserve all the rights and responsibilities of citizenship.

he Sumerians figured out how to collect and channel the overflow of the Tigris and Euphrates rivers

then use it to water and fertilize their farm fields.

designed complex systems of canals, with dams constructed of reeds, palm trunks and mud whose gates could be opened or closed to regulate the flow of water.

We didn’t see much difference in our behavior measures, regardless of whether the schools had a uniform policy or not.”

About 6 out of every 10 private schools required uniforms in 2011-2012.

Every academic year, teachers rated each student on three dimensions: internalizing behavior problems (such as anxiety and social withdrawal), externalizing behavior problems (such as aggression or destruction of property) and social skills.Teachers also reported how often each student was absent.Overall, school uniforms had no effect on any of the three dimensions of behavior in any grade, even after taking into account a wide range of other factors that could potentially affect students’ behavior.

Employment and equal payIn the labor and economic sector, the first minimum-wage law was enacted in Massachusetts in 1912. The legislation was written to help 15,000 women facing severe poverty who were earning low pay for long hours. The 1938 Fair Labor Standards Act later established a federal minimum wage without regard to sex.