Parents in London are being forced to take their children out of mainstream schooling because they are black, a support group claims.
Black Parents in Education says there is an attitude in schools that young black boys will fail.
Paul Phoenix from the Lewisham-based group said there was also little incentive to tackle under-achievement.
He said five London families had approached him, but there was an increasing problem around the UK.
This comes as the head of the Commission for Racial Equality, Trevor Phillips, suggested black boys may have to be separated from classmates to help improve school performance.
Mr Phoenix also accused schools of being too focused on targets and failing to provide sufficient support for children struggling with the curriculum.
He said parents were increasingly frustrated with how the education system was affecting their children.
Black Parents in Education gives advice to parents on home schooling.
Philip Trelbar of the Department of Education and Skills, said: "Teachers are a highly professionalised workforce for whom race and religious inclusion is a top priority in a multicultural society.
"Targets are vital to maintaining high standards and new value added performance measures recognise schools making the greatest of efforts rather than towards the most able children."