Here is the Washington Post story on the polling data, the civil rights movement, and Black Lives Matter. The story is the source of all the visualizations contained below. Here is the original polling data.
1) Polling data (and jobs) have been around for a long time: We may be in the era of Big Data, but polling data has been around for a long, long time. And Gallup, the organization that gathered some of this data, has been around for a long, long time and may hire your baby statisticians some day. And statisticians and researchers do more than run analyses all day: They work with clients (here, Gallup worked for Newsweek) to organize massive data collections in order to better understand social issues.
2) Data can inform just about anything: This data informs our understanding of history. Typically, the two fields seem very separated, but this time, they aren't. This makes it another larger example of how data might be useful to our students outside of the classroom: It can be used to inform debate and enrich our perspective of current events and history.
3) A clean, easy to read example of a stacked bar graph.