A bit of wisdom from a grad school mentor on sarcasm, paraphrased:
Sarcasm is corrosive. It creates false intimacy. For every kid who might think it’s funny, there’s another who is terrified and will never say a word to you about it.
I’ve been thinking more about this recently. I can be pretty sarcastic at times, without much purpose. It’s easy to go for quick laughs. It’s much harder to think about whether there is a student in the corner who is terrified. And it’s especially important for students in math classrooms with deeply entrenched mindsets and dispositions toward math.
I wonder what my class would be like if I replaced my sarcasm with sincerity? Food for thought.