Video later surfaced showing police officers using a stun gun on the student.
The student, Dnigma Howard, was charged with two felony counts of aggravated battery to a peace officer and two misdemeanor counts of resisting and obstructing a peace officer. Wednesday morning, prosecutors said the charges were dropped.
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"She has plans," Laurentio Howard, Dnigma's father, said. "She wants to go to college. She has a job...I'm glad it was vindicated today by the state's attorney."
"I'm ready to get back to school...I am very happy. I'm thankful," Dnigma Howard said.
The incident happened Jan. 29 at John Marshall Metropolitan High School, 3250 W. Adams St. in Chicago.
According to Chicago police, the officers were escorting the student following a confrontation between the student and the assistant principal.
As the student was being led away, police said she began fighting with officers causing her and one of the officers to fall down a flight of stairs, said police.
The teen was identified as Dnigma Howard. Laurentio Howard blames the school for not following protocol for his daughter's history of behavioral issues. He witnessed the incident.
Chicago police said the officers involved will be reassigned to different duties as COPA and the CPD Force Review Unit complete independent investigations into the incident.