Sulit was arrested August 11 and pleaded not guilty during a Friday court appearance to three counts of oral copulation of a minor and one count of sending harmful material to the girl's cellular telephone for the purpose of seducing a minor.
He remains in jail with bail set at $25,000.
Sulit has been a teacher at Silverado High School for six years.
Detectives urge anyone with information about the case to contact Detective Julie Brumm at (909) 387-3615 or remain anonymous and call WeTip at (800) 78-CRIME (800-782-7463).
The Associated Press contributed to this report.