I mean one way to teach this class would be to simply cover current events in an over the top, biased way and then discuss the tricks used and concerns.
(Maybe students get credit for credibly challenging anything mentioned in the class)
I taught high school for a hot second. I think the approach you suggest would be terrifically engaging for students. Teach them the tricks and make a game of trying to fool one another by setting up two competing teams of "news media," print and talking heads. Essentially, you're teaching them informal fallacies.
(Maybe students get credit for credibly challenging anything mentioned in the class)