It found some teachers are reluctant to cover the atrocity for fear of upsetting students whose beliefs include Holocaust denial.
There is also resistance to tackling the 11th century Crusades – where Christians fought Muslim armies for control of Jerusalem – because lessons often contradict what is taught in local mosques.
The findings have prompted claims that some schools are using history ‘as a vehicle for promoting political correctness’.
The study, funded by the Department for Education and Skills, looked into ’emotive and controversial’ history teaching in primary and secondary schools.
It found some teachers are dropping courses covering the Holocaust at the earliest opportunity over fears Muslim pupils might express anti-Semitic and anti-Israel reactions in class.
The researchers gave the example of a secondary school in an unnamed northern city, which dropped the Holocaust as a subject for GCSE coursework.
The report said teachers feared confronting ‘anti-Semitic sentiment and Holocaust denial among some Muslim pupils’.