ATOKA COUNTY, OKLAHOMA -- A former Atoka teacher was sentenced to eight years in prison this morning.

32 year-old Casey Hauff pled guilty to eight of the 11 charges against him, including second degree rape, forcible sodomy, sexual battery and solicitation of a minor.

During an OSBI investigation, five female victims came forward, saying Hauff offered them better grades, in exchange for sexual acts.

He resigned from his position as a coach and biology teacher in October.

Atoka's court clerk says he'll serve eight years in prison followed by 12 years probation.