Who determines the Seven Wonders of the World, and what criteria is used to evaluate these locations? Discover the efforts to promote cultural diversity and preserve man-made monuments during the world's first-ever global vote in 2007 to...

What do BC and AD mean on a timeline? What is the difference between a decade and a century? Here is a nice handout that offers all the foundational knowledge your young historians will need on how to look at historical timelines.