A 24-year-old high school math teacher is accused of having sexual contact with two students in her classroom and exchanging inappropriate texts and nude photos.

Meredith Powell, who taught at Lincoln High School in Tacoma, allegedly performed oral sex on a 15-year-old and, in a separate incident, had sexual contact with a then 15-year-old while the rest of the school was attending an assembly last month.

Court documents obtained by KIRO claim Powell admitted her illegal behavior, though she pleaded not guilty on Friday to two counts of third-degree child rape and one count of communication with a minor for immoral purposes, according to the News Tribune.

The court documents say Powell also allegedly sent one of the students a nude photo of herself in a bathtub through Snapchat.

Police said Powell also sent sexually explicit text messages to a third, 17-year-old student, according to the Seattle Times.

She allegedly sent a text to the 17-year-old's girlfriend apologizing for her "promiscuous" texts.

CORRECTION: A previous version of this story identified one of Powell's alleged victims as a 16-year-old. Charging documents indicate he was 15 at the time of the alleged incident.