This Socratic Seminar based around the ideas and values of Manifest Destiny and includes a study of "American Progress" by Thomas Gast and "Trail of Tears" by Robert Lindneux will engage students in an open discussion in which they will take ownership of their learning.
This file will give you a scaffold Powerpoint document that includes an opening question, directions for pre-seminar analysis, a full-set of Seminar Questions, and post-seminar activities.
I have taught US History for three years. In my first year, using 10-12 Socratic seminars, student scores on their state mandated tests jumped 30 points.
Many college classes are structured in a Socratic analysis style so it is very important to begin exposing students to this format of learning and discussion.