How common are school fights and physical violence in your country schools?

Question explains but for context I was wondering how kids (usually of junior high to high school age) fight, and how often they fight in Iran.

In Venezuelan schools, fighting is very common. However please don't think that all Venezuelans or Latin Americans are violent. It's not rare, but it's also not everyone that behaves violently and get into fights all the time. I'm just curious is all.

How common are school fights and physical violence in your country schools?
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