A teacher from Edgware has been suspended from the profession after being found guilty of racism.
Adeniyi Kolade, of Montrose Avenue, admitted calling a pupil 'ching' in relation to the child's ethnic background.
Mr Kolade, a teacher at Highgate Wood School, in Haringey, also told a year seven class "people who don't learn end up having rubbish jobs like street cleaners, or rubbish men" and "bad people come from bad families".
The hearing held by the General Teaching Council (GTC) found him guilty of unacceptable professional conduct over the comments he made in 2006 and suspended him for six months.
Other verbal blunders made by the teacher, who is black African, include telling a class "black people these days don't get the right education" and "dumb people would go into stupid categories and would be sweeping roads".
David Storrie, chairman of the disciplinary panel, said: "In using such expressions Mr Kolade demonstrated a lack of cultural sensitivity and a tendency towards racial stereotyping.
"He addressed us on the basis of his cultural background and experience, but we are not satisfied that this justified his lack of awareness of cultural sensitivities of pupils in his care.
"Mr Kolade's conduct fell short of the standard expected of the profession. He seriously demeaned and undermined pupils or acted towards them in a manner which was discriminatory in relation to colour, race or ethnicity."
According to the GTC, Mr Kolade expressed no regret and gave no apology during the hearing on October 24.
The council has also ordered the teacher to complete training in diversity awareness during his suspension period.
Headteacher Patrick Cozier said: "I can confirm aAn incident took place at Highgate Wood School in November 2006 involving a supply teacher who was covering for an absent member of staff.
"We responded swiftly and reported the incident to the supply agency with whom he was employed. Subsequently we also assisted the General Teaching Council with their investigation.
"I met with the family of the child concerned and they were kept fully informed on how the matter was being dealt with.
"The teacher concerned has not been used by the school in any capacity since the incident."