27-year-old Atiff Brown of South 60th Street was taken into custody at the A.B. Anderson Elementary School at 10:00 a.m. Thursday.
She was arrested for assaulting an 11-year-old student.
Brown has been charged with Making Terroristic Threats, Simple Assault, Recklessly Endangering Another Person and Defiant Trespass.
No one was seriously hurt in the incident.