Geography has played a complex role in America history. The Atlantic Ocean has served as a buffer to protect the United States from European Wars, but its proximity to Cuba, however, left it vulnerable to nuclear war during the Cuban...

Was the Southern states' decision to secede from the Union protected by the United States Constitution? Eighth graders discuss the constitutionality of the South's justification for secession, particularly the secession of South...

Ready for a test that uses primary sources as a tool to assess comprehension? Learners answer multiple choice, essay, and short answer questions to demonstrate their understanding of American history.

Show your class how engineers use graphs to understand large and complex systems. The resource provides the beginnings of graph theory by introducing the class to set theory, graphs, and degree distributions of a graph.