I was 14, sitting in algebra class when they announced it on the speakers. Our school had been built in 1909, so there were no televisions in the classrooms. Teachers let students go to AV or the commons (they put a TV there) or even the teacher’s lounge to listen to the news.
How things have changed, and how they haven’t...
Similar experience with the JFK assassination - second-grade teacher answered the classroom phone, burst into tears, and sent us all home.