Truancy is a much neglected topic in the sociology of knowledge. It is mistakenly treated as irrational, even criminal. It is correctly linked with children's learning deficits. These usually arise, however, not from home, but from faulty curriculum and pedagogy.

People think truants hate school. They rarely do, though they often dislike particular subjects and certain sarcastic or rude teachers. My research in Britain and Bruce Cooper's in the US have revealed the huge scale of the phenomenon. In some secondary schools half the children truant regularly.

The American and British establishments blatantly gloss over the problem, along with all those educational difficulties originating in the school itself, echoing the way the old Communists concealed the truth about Communism. The American elite are even more defensive than their British counterparts. This is a disastrous mistake.

Truancy data constitute incomparably rich policy material. We already know that semi-literates truant because they cannot do the work, and that clever children do so because they find the work derisory. We know that a large minority hates games and PE. We know foreign languages are very badly done in both countries. We know that wrong methods of teaching reading have been practiced for 150 years in America, and in Britain for almost a century.

In both countries mathematics teaching is appalling. In both systems political correctness has raged through the curriculum, destroying the authority of the teachers. These indefensible school practices cause truancy and do, indeed, compound the effects of bad homes. Were it not for these poor practices, schools might combat unsatisfactory home life. Sad to say, huge vested interests stand in the way of the requisite reforms. And the related questions of compulsory education and home schooling have not even been brought into the truancy debate.

Dennis O'Keeffe is Professor of Education at the University of Buckingham.