An employer should be able to fire an employee in situations like this, whether it's the public or private sector. Instead, and arbitrator gets to decide that a 30 day suspension was appropriate and the employer, the school district has to live with that.
And this story is another that shatters the "it's all about the children" myth the education establishment works so hard to maintain. If it's all about the children, why does the teacher's union stand behind an abusive teacher. And even the arbitrator concedes there is inappropriate behavior here. Because it's all about protecting teacher's jobs, that's why.