A report by UK telecommunications giant BT says they also have concerns over training, funding and access to advice.

However the report, Heading for the Superhighway, concludes that heads are convinced of the educational benefits of ICT and committed to exploiting its potential.

The report pinpoints a number of key issues for headteachers, including staff training and identifying how a new piece of equipment will support the curriculum.

The Chief Executive of BT, Sir Peter Bonfield, said the report would be a valuable guide for schools.

"It is not enough simply to provide schools with computers and communication links," he said.

"New technology makes new demands of teachers. They have to be equipped to make effective use of that technology in the classroom and to learn how to harness its potential."

'Invaluable checklist'

The report was compiled by a group of teachers and headteachers, who were selected for their experience and expertise in the field of ICT in education. They carried out the research at more than 250 schools in England, Scotland and Wales.

The General Secretary of the National Association of Head Teachers, David Hart, welcomed the report.

"It is an invaluable checklist against which all national and local initiatives should be measured," he said.

The Teacher Training Agency plans to use the report findings in its training programmes for new and serving headteachers.