Differentiate by interest

One unit I am teaching is tolerance. There are several readings and videos I want my students to see, but so little time. I give the students a short overview of each of the readings on a file folder. Each student is given two post-its on which to write their name. The file folders are passed around and they put their post-it on their top two choices. This encourages students to choose a topic of interest. I find this helps with ownership of the concepts as well as enthusiasm for their issue, because students had choice in their work.