"Selection – or segregation as it should be called – entrenches division and increases inequality," said Shadow Education Secretary Angela Rayner MP when she addressed the 2016 Labour Party Conference.
"Selection is toxic. It tells a clever child they are stupid, strips a child of self-esteem and embeds inequality. Every child has potential. Every child can succeed. No child should be left out or left behind."
There are currently 163 grammar schools in England, which admit pupils selected by an examination undertaken at the age of 11.
Under plans proposed by the Conservatives, current grammar schools would be allowed to expand and all schools in England would be given the right to apply to select pupils based on their academic ability.
The founding of new grammar schools was banned by Labour in March 2000. At the time, Labour's Education Secretary David Blunkett said the ban was an attempt to avoid "the whole debate in education concentrating on the issue of selection when it should be concentrating on the raising of standards".
You can sign our petition to oppose the Tories' divisive plan by clicking here