I show "Living on One" to my Middle and High School students every year. I teach in a place where some students are impoverished.... by US standards. During the Holiday season, when students are sometimes feeling like they don't have enough, or don't receive enough, it is a good time to give them the perspective of others in the world.
Anticipatory Set: I give students the tracking sheet before I even tell them that we are watching a movie. I have students track what they eat in a 24 hour period because many students have no perspective on calories or cost of food. If they eat a Peanut Butter Sandwich at home, I have them estimate costs based on what things would cost at a restaurant OR parts of a loaf of bread, parts of a jar of PB, etc.
The next day, we have a class conversation about how many calories each student ate that day. I tell them the average American eats more than 3600 per day. (Typically, someone in the class will brag about how much more they eat than that).
Then, we talk about cost. Really emphasize how much students spent that day for food. Lunches are $3... McDonalds meals are $8-$9, etc.
With that as a basis for learning, I show the movie.
This listing comes with the Anticipatory Set worksheet (30 minutes discussion) and 19 viewing questions. I use this lesson in my Spanish class, but it is a good Civics lesson for any subject matter. All materials are in English.