By Hannah Goff BBC News, at the NASUWT conference

Teachers say the current pay deal as a 'standstill award'

More than half of primary school teachers with extra roles like managing a subject are not getting the relevant allowances, research suggests.

Teachers at the annual conference of the NASUWT also joined the mounting protest about public sector pay.

The government has set itself a 2% public sector pay target.

The NASUWT polled more than 15,000 teachers on pay.

It found some primary school teachers were missing out on extra allowances worth up to �11,500.

And women teachers were less likely than their male counterparts to get the extra payments, the poll suggested.

'National disgrace'

General Secretary Chris Keates said it was totally unacceptable.

She said a new package of measures to reward teachers taking on extra responsibilities had been agreed with the government but was clearly not being implemented properly by school governing bodies and local authorities.

She said at her union's conference in Belfast: "We've exposed in this survey a national disgrace about the way primary school teachers are being treated.

"They are still doing unpaid responsibilities and this shouldn't be happening with the system that we have introduced in social partnership with the government."

She said things were particularly bad in smaller schools where there was a culture that said if teachers had extra duties they did not need to be paid.

"If something is worth doing then it should be paid," she added.

She said the situation was an "an outrageous de-professionalisation of primary school teachers," adding that they were being exploited because they tended to shy away from industrial action.

Teachers have not staged a national strike over pay in nearly 40 years. There was also a real issue about discrimination, she said, with more men (55%) than women (42%) getting their extra responsibility payments after pay scales were restructured.

Ms Keates said her union would take evidence to the national pay negotiating body and that it would be advising teachers not to carry out the duties for which they were not being rewarded.

The union is to debate a motion on the issue at its conference later.