Introduce the concept of redistricting and gerrymandering with one of these three short web videos.
"Gerrymandering, explained" by the Washington Post (2:41 run-time)
"Gerrymandering: How drawing jagged lines can impact an election" by TED-Ed (3:52 run-time)
"Gerrymandering: Crash Course" by PBS Digital Studios (7:57 run-time)