Investigators charged Joanna Frantz, 59, with misdemeanor larceny after getting a call from the store about a person hiding supplies in her raincoat.
Investigators said Frantz cooperated with store staff and police when confronted.
They said she had nearly $225 worth of unpaid merchandise in her possession.
Frantz is a teacher at Clayton High School.
According to Jocoreport.com, she teaches art classes and has been at the school since August 2013.