Brought to you by the HLN Family Publishers - an award-winning publisher of education content and unit studies on the web. Each unit contains explanatory content and is chock full of online resource links and book suggestions. Also included: 6-8 lesson plans and 2-10 worksheets. Days and days of learning and exploration within each unit! This unit study uses age-appropriate, reviewed links across the web to further your knowledge on this topic. It is best utilized with an internet connection. Great for homeschoolers, teachers, and anyone interested in having fun learning more about this topic.