. >> reporter: abby graduated from redbank valley high school. where she learned how to discuss the issues while still respecting the people who disagreed with her. >> when i was in 8th grade, dr. harman's civics class, he talked a lot about our civic duties and how important it is to be involved, and if we're going have opinions, we need to take action on that. >> reporter: redbank valley high school is about an hour northeast of pittsburgh. a fairly staunchly red part of western pennsylvania. the school has a highly engaged civics curriculum. our terry moran was there back in 2016 for the school's mock election. >> donald trump with a landslide victory here. >> in the redbank valley. >> at redbank rally. >> reporter: we checked with him a lot over the years. i was there in 2020 when they again went for trump. >> donald trump with 870 votes. >> qualify joe biden with 56. >> reporter: once again, we are here at redbank valley high school. this is "nightline's" sixth time here since 2016. we're going civics class. today we're talking about the pre