I've seen it work a million times over...Time Out! That seems to be a go-to punishment and really, it makes sense. After a warning, removing the child from the situation is the logical choice (to me). So, in my classroom, we will have a time out corner. However, I'm adding a twist to it.
I'm calling the time out corner, the Think Spot. I found a cute little
sign in the Walmart Dollar Bin to hang back there that says "Take It
While the student is in the Think Spot, they will have a paper to fill
out. This paper allows them to reflect on the choices they have made to
land them in the spot. Reflection is the only way they will understand
the punishment. Here's a picture of my Think Spot worksheet: