A school in Dorset says it has disciplined three boys after they played a "racist" video in class which caused offence to a South Korean pupil.
Mi Lowe said the footage seen by her 14-year-old son at Portchester School in Bournemouth mocked their culture.
The video, called "I'm a Korean", showed images relating to North and South Korea to the backing of the Black Eyed Peas' song I've Got A Feeling.
The school has apologised said it takes racism very seriously.
The footage, downloaded from the internet, was played while pupils researched different countries' musical traditions in the build-up to the World Cup.
Mrs Lowe, who said her son suffers regular verbal racist abuse, told BBC News: "It [the video] was making fun of Korean culture.
"The whole class was laughing at the situation.
"My son was devastated, upset, very offended, feeling very lonely as he was the only Oriental person in the class."
Len Idle, assistant headteacher, said he thought the video was "probably racist".
He added: "I want to take this opportunity to apologise to Mrs Lowe that the actions of a minority of pupils have upset her and her son on this occasion."
The school said it will learn lessons from the incident but limiting internet access would "sanitise" pupils' education.
All the parties involved are expected to meet and discuss the matter.