School officials fired him earlier this month as a result.
Earlier this month, Pfaff told Eyewitness News that the student was being disruptive and refused to move from his seat, and admitted that he may have used too much force in trying to get the student to stand up.
"When that happened, I was panicking. I was like, 'I'm losing my job, that's it. I'm done'," he said in a previous interview.
On Tuesday, his attorney called the arrest an "unfortunate situation."
"It's a shame that there is an arrest to begin with but that's the age we live in. He's now without a job and he's a defendant in a criminal case because he tried to discipline a kid who needed discipline and teachers can't discipline anymore, those days are out," said Attorney Hugh Keefe.
Pfaff was charged with reckless endangerment and second-degree breach of peace.
He was released on a promise to appear in court for his arraignment.
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