Teaching and news go hand in hand. Does teachers try and pass opinions off as facts, or just stick to the actual news.
I'm sure there are some that do. Mostly that isn't the case though. Actually teaching the difference is part of what goes on in a school.
What generally happens is this. A teacher has a passage about a topic. The secondary lesson is about inference or fact and opinion or something. Some kid things something in the passage is about something their parent hates. They only half listen and go home and mention it to their parent. Parent loses their crap and calls the school and the district up in arms. Teacher calls the parent and actually explains the lesson. Parent is like, 'Oh, yeah, that makes sense', or if they are kind of out there don't get it and still complain. Regardless, people hear about this and think the school is teaching things they aren't and everyone is like all, 'That school is teaching my sweet baby about x and I ain't gonna take it'.