The Respect for All website, put together by the Qualifications and Curriculum Authority, was supposed to go live at the end of last year.
It aims to help schools to meet the statutory requirement to promote racial equality and good race relations, which came into effect last April. Office for Standards in Education inspectors now report on anti-racism work in schools.
The TES revealed last August that the QCA guidance would challenge racism through every curriculum subject at every key stage, using examples of schools which successfully tackle such attitudes.
However, there is still no firm publication date, even though the QCA has completed the work. Department for Education and Skills officials are sitting on the material. A recent series of conferences organised to introduce teachers to the anti-racist material went ahead without the website being available.
The hold-up is connected to revelations earlier this year that a draft of the guidance suggested teachers instil a feeling of pride in white culture in their pupils.
It said: "One criticism of anti-racist education has been that although it exposed the effects of racism perpetrated by white western Europeans, it left white pupils feeling they could not be proud of their own culture and identity."
The Government distanced itself from the ensuing row, insisting it was draft material. It is unclear if the reference to white pride has survived in the final version. If it has been removed, a storm of protest from traditionalists is likely.
A government spokeswoman said: "Respect for All is a website rather than a written piece of guidance. The QCA has been developing that website for us. The department is considering the website at the moment, and part of that involves when it should go live."
A Campaign for Racial Equality spokesperson said: "We are concerned that the Respect for All website is not up and running yet. Under the amended Race Relations Act, public authorities have a duty to eliminate unlawful discrimination, and to promote equality of opportunity and good race relations.
"It is extremely important that schools have access to appropriate curriculum material if they are to address the duty effectively. We expect Respect for All to be the first step in the QCA's work to meet its own general duty and to support schools in meeting their duties.
"We would expect the site to be launched as soon as possible."