TULSA COUNTY, Oklahoma - Prosecutors have charged a 22-year-old Bixby substitute teacher with three counts of lewd proposals to a child and one count for soliciting a minor for indecent exposure.

Police said Anna Lewis and a freshman student used Instagram and Snapchat to exchange nude photos.

Lewis was arrested December 13by Bixby police after they said she was accused of having an inappropriate relationship with a student while working as a substitute teacher at Bixby.