A 57-year-old grandmother is accused of seducing a 15-year-old boy at the school where she worked as a teaching assistant.
Elaine McKay - who has two daughters aged 26 and 29 and is understood to have two grandchildren- is accused of starting a sexual relationship with the underage boy, to have incited him to engage in sexual activity and to have shown him pornography.
The offences are said to have taken place between June 1 last year and May 13.
McKay, from Clacton, Essex – who has been suspended from her job – appeared before Colchester magistrates where her case was referred to Chelmsford Crown Court.
She is charged with having sex with a boy aged 15, causing or inciting a boy to engage in sexual activity, and causing a child to look at an image of sexual activity for the purpose of obtaining sexual gratification.
She was granted bail until her next appearance on January 13, on condition that she does not have any contact with the alleged victim.
McKay was a teaching assistant at 1,700-pupil Clacton Coastal Academy where she had worked for five years.
A spokesman for Academies Enterprise Trust, the academy sponsor, said: "We can confirm that a 57-year-old learning support assistant was suspended in May 2013 from Clacton Coastal Academy when allegations were first made known to the school of an inappropriate relationship with a student.
"Since then the school has been working in close co-operation with Essex Police and Essex Social Services in support of their investigations. The suspension is a neutral act to enable fair and thorough investigations to be carried out by both departments and by the school.
"Elaine McKay was first employed from September 2008 at Colbayns School which became Clacton Coastal Academy in September 2009. While the matter is before the courts we are unable to comment further."