Engage your students in exploring one of the most critical debates of Manifest Destiny: the justifiability of the Mexican-American War. Through cooperative analysis of four primary sources from both those in favor (President Polk, John L. O'Sullivan) as well as those opposed (Frederick Douglass, Charles Sumner), students will identify arguments given from both sides as to whether or not the war was justified.
Product includes a teacher lesson plan, four excerpted primary sources (including line numbers for citation purposes), an argument data retrieval chart, and an exit ticket activity, which asks students to compose a letter to a local newspaper either supporting or opposing continuation of the war. A rubric is provided for grading of the exit ticket. Lesson plan includes correlation to appropriate Common Core standards.