Suffolk investigators say the girl first reported the physical abuse last year. Child protective services were called out to her school, Hillpoint Elementary, in December.
Police say the four-month-long investigation into the abuse ended Tuesday when Lewis was arrested.
A friend of Lewis tells NewsChannel 3 that Lewis is a mother of five children and the victim is a first grader at Hillpoint Elementary.
Lewis is behind bars at Western Tidewater Regional Jail charged with felony child abuse and child cruelty.