According to the report I read, in the Osaka school, one of the assaulted teachers managed to sound an alarm that notified others to call the police. As our vice-principal said at the meeting, our school doesn't have such an alarm.
This isn't the first such incident Japan has had. They've been happening for quite a while, at least since I was in Niigata. Every time it happens, all the schools talk about safety precautions...which generally amount to making sure visitors wear guest passes.
Other than that, today was pretty uneventful. I had my last class with the first-year students. After this, they'll be gone on the ski/snowboard trip, and the week after that they'll be taking grammar classes instead of my communication class.