“What caused the Upper Pima (O’odham) Rebellion?” Students will encounter various answers to the essential question through the close reading and study of several primary and secondary sources. Students will have the opportunity to understand the impact of the Spanish mission system on native peoples and to investigate some of the causes of the rebellion. Background Be sure to read the documents before teaching the lesson. The documents are a mixture of secondary sources (Documents A-C) and primary sources (Documents D-E) and can be presented in a variety of ways, of which this lesson is but o Duration: 60 Minutes.