This is taken from good old Wikipedia...
"Another Brick in the Wall" is the title of three songs set to variations of the same basic theme, on Pink Floyd's 1979 concept album, The Wall, subtitled "Part I", "Part II", and "Part III", respectively, all of which were written by Pink Floyd's bassist and then lead songwriter, Roger Waters. It's one of the band's most well known songs and also their biggest hit, peaking at #1 on the American singles charts and also the UK charts. In addition, the second part was #375 on Rolling Stone's 500 Greatest Songs of All Time list.[1]
"Part II", best known for the line "We don't need no education", was released as a single, and provided the band's only number-one hit in the UK, the US, West Germany and many other countries. In the UK, it was their first single since 1968's "Point Me at the Sky". It is a protest song against rigid schooling in general and boarding schools in particular, which has led to the song being banned in several countries.[2]
For "Part II", Pink Floyd needed a school choir, and producer Bob Ezrin asked sound engineer Nick Griffiths to find one. Griffiths approached music teacher Alun Renshaw of Islington Green School,[3] around the corner from their Britannia Row Studios. The choir were not allowed to hear the rest of the song after singing the chorus, and were let down, as they wanted to hear Gilmour's solo[citation needed]. Though the school received a lump sum payment of £1000, there was no contractual arrangement for royalties from record sales. Under 1996 UK copyright law, they became eligible for royalties from broadcasts, and after royalties agent Peter Rowan traced choir members through the website Friends Reunited and other means, they claimed their payments. Contrary to press reports, this did not involve suing Pink Floyd. Music industry professionals estimated that each student would be owed around £500.[4]
"Part II" gave Pink Floyd a Grammy nomination for Best Performance by a Rock Duo or Group and lost to Bob Seger's "Against the Wind".
In 1980, the song was adopted as a protest anthem by black students during the "Elsie's River" uprising in South Africa, protesting against the racial propaganda and bias in the official curriculum. On May 2, it was banned by the government."
Further info found here...
en.wikipedia.org/wiki/Another_brick_in_the_wall 
