LONDON (AFP) - A 14-year-old boy was handed an 11-year sentence on Monday for stabbing his teacher in the stomach in a racially motivated attack.

The teenager, who cannot be named due to legal restrictions, admitted causing grievous bodily harm with intent to Mr Vincent Uzomah, who is black, at a school in Bradford, northern England.

The boy used a racially offensive term before knifing the 50-year-old teacher in a pre-planned attack in June before his classmates, then bragged about the attack on Facebook.

"What you have done is utterly shocking - deliberately, callously stabbing him," Judge Jonathan Durham Hall said at Bradford Crown Court.

He sentenced the boy to six years in custody and a further five years on licence. The youth is likely to serve half of the six years in detention.

Around 20 minutes after the attack, the boy posted a message on Facebook which said Uzomah was "getin funny so I stick the blade straight in his tummy".

Some 69 people said they liked the post.

"It's an appalling reflection on a small microcosm of our society that within minutes or hours after posting, 69 people 'liked'. How sick." said Judge Hall.

"You are a dangerous young offender," he added.

The teenager yawned and folded his arms as Judge Hall passed sentence.

Prosecutor Jonathan Sharp said Mr Uzomah had suffered serious physical and psychological injuries and it was uncertain whether he will feel able to return to teaching.

Mr Uzomah said outside the court that he had forgiven his attacker through his Christian faith.

"It was, however, important for the law to run its course and for a strong message to be sent out, especially to kids of similar tendencies, that violence is not acceptable," he added.