The trigger that set off World War I was the assassination of Archduke Ferdinand of Austria. This set in motion events with some underlying causes. Militarism, secret alliances, imperialism, and nationalistic pride all lead to World War I.
Purchase the unit that accompanies the information found on this website at Teachers Pay Teachers. The resource includes both the printable lapbook and digital resources. Digital activities include Google Doc articles, Google Slide organizers, and Google Form quizzes. These are leveled for upper elementary students.