It happened around 10:30 a.m. Thursday at Howard High School at 401 E. 12th Street in Wilmington.
Police tell Action News that two students were involved in a fight. One student, described as the aggressor, was picked up and thrown to the floor.
Medics transported that student, who suffered a head injury, from the school as a trauma alert to Christiana Hospital.
The other student involved suffered a gash to the wrist during the fight. That student was also taken to Christiana Hospital.
New Castle County Vocational Technical spokesperson Kathy Demarest says only two students were involved, a 9th and a 10th grade student.
Demarest says at this time any disciplinary action will be determined pending the outcome of the police investigation.