In The Hunger Games: Mockingjay, District 3, which is considered an upper-middle class district, serves as the technology district for all of Panem. They, like the other districts, are still held under the president’s regime. Smart and knowledgeable, the citizens of District 3 were once the rebels, who started the first uprising.
In The Hunger Games: Mockingjay, the citizens of District 9, the grain district, work hard to provide food for all of Panem. They too struggle, as do the other districts, to stay alive and feed their families. Ironic, isn’t it?