Lewis and Clark's famous expedition is a prime example of the United States' westward expansion. Aspiring historians examine maps from Lewis and Clark's journey, as well as discuss their interactions with Native American tribes. The...

In this online interactive Civil War instructional activity, students respond to 10 multiple choice questions about John Brown's Raid. Students may check their answers immediately.

In this water worksheet, students complete the chart about precipitation and population and answer short answer questions. Students complete 14 rows in the chart and answer 4 questions.

In this editing in context worksheet, students edit a rough draft of an essay.  Students must identify errors and choose the best correction from five choices.  Students have 12 minutes to complete 12 questions.

Find fast facts about surveying archaeological sites by flipping over this interactive card. Also, answer quiz questions to test your knowledge about mapping and measuring.

The 2011 Philippine Biodiversity Expedition is the largest expedition undertaken by the Academy. It will be the first expedition to make a comprehensive survey of both terrestrial and marine diversity.