Spencer had been an English teacher at Northwest Whitfield High school since 2013, and was an assistant cheerleading and girls track and field coach there. She was arrested in April 2018 after staff and students at school noticed her behaving unusually and notified school officials.
Authorities said Spencer consented to a search, and heroin was found on her personal property, AJC.com previously reported.
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A day later, additional charges were added when investigators determined Spencer was sexually involved with a student.
The Whitfield County Sheriff's Office told the Dalton Daily Citizen that its preliminary investigation revealed Spencer was allegedly involved in a sexual relationship with a student for at least a year. The student was underage at the time.
A charge against Spencer for possession of a Schedule 1 controlled substance was dropped as part of a plea agreement, the Dalton Daily Citizen reported.