Self-Defense in the Classroom

It is a real shame we have to talk about these kinds of things. I hate it. And, I hate when my students ask me about this topic very early in our courses together. There is clearly a lot of concern in the teaching force about protecting themselves against students. 

Here is the latest incident. 

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This is an issue we don't really talk about in the textbooks ... but perhaps it is time that we need to address it more formally. I hate giving into this as the modus operandi, but it seems we have little choice.