A four day trial claimed that 25 year old Hannah McIntyre, seduced a 16 year old male student at her home after giving him cider.
Miss McIntyre, of Waterloo, Merseyside, was a classics teacher at Merchant Taylor's boy's school on Merseyside.
McIntyre denied the charge of one count of sexual activity with a child by a person in a position of trust in a Liverpool Crown Court.
She believes the boy made the story up to deflect attention from his bad behavior at school.