Thomas Khoe, 37, pleaded guilty Monday to two counts of aggravated assault and battery and no contest to a third.
The former band director at Chapman High School in Inman was placed on probation for four years. He will not be allowed to teach and cannot take a job that puts him in a supervisory role over anyone younger than 18.
Mr. Khoe also will undergo a mental evaluation to determine whether he should register as a sex offender.
The girls on the color guard came forward with accusations of inappropriate conduct against Mr. Khoe in fall 2007. He had been at Chapman from 1999 to 2007.