This massive list of links below will take you to websites like Icivics where you can take part in simulations of how different elements of the government work (or are supposed to at least) or Reviewzone where you can basically practice flashcard and trivia questions while playing knockoffs of Atari Classics. For the Reviewzone games, do NOT click the ads but focus on the games like Wild Taxi, Alien Intruders, Ghost Man, Paper Bird etc.