The 16 year old girls, who cannot be named, both pleaded guilty to one count of assault occasioning actual bodily harm.
One defendant also pleaded guilty to assaulting a second teenage girl by beating on the same day.
Police were called to Thomas Knyvett College in Ashford in February following a disturbance.
One 16-year-old girl pleaded guilty to causing actual bodily harm and assault by beating. She is due to be sentenced on Wednesday, the 22nd of November at Guildford Magistrates’ Court.
Another 16-year-old girl pleaded guilty to causing actual bodily harm. She also pleaded not guilty to racially aggravated assault occasioning actual bodily harm and malicious communications. The 16-year-old has been bailed until she stands trial at a date which is yet to be fixed.