Teachers at the primary school in Coventry have been balloted by their union, the National Association of Schoolmasters/Union of Women Teachers (NASUWT), after they were told that the seven-year-old pupil should be reinstated.
The pupil was expelled by the headteacher after he made malicious allegations about a teacher and repeatedly threatened other staff and children with violence.
The decision to remove the child, who was said to have a 'history of violent behaviour', was backed by the governors but overturned on appeal.
The case has direct echoes of last week's revelation that two teenage boys aged 15 and 16 who had made death threats against a teacher at the Glyn Technology School in Ewell, Surrey, were to return to school.
Despite being excluded by the headteacher, the two boys were reinstated, again by an independent appeals panel.
Observer inquiries have revealed a series of similar cases of reinstatement across the country.
One teaching union alone, the Association of Teachers and Lecturers, had 70 ongoing cases during the month of July.
Earlier this year the NASUWT produced a report which identified nearly 70 schools across the country where discipline problems were rife and where headteachers felt they were undermined by expulsions being overturned.
The union said there remained four outstanding cases, including the one in Coventry, where subsequent reinstatement of expelled pupils had led to threats of industrial action.
Estelle Morris, the Education Secretary who has come under attack for her 'unhelpful intervention' in the Ewell case, has ordered her officials to review the operation of the independent panels. Changes are already due to come into force in January which will weaken the powers of panels to reinstate any pupil who has been violent and ensure that the panels include members with teaching experience - not presently the case.
At present panels are only asked to consider the welfare of the expelled pupil. Panels will also no longer be able to overturn expulsion decisions on a procedural technicality, as happened in the case of the death threat teenagers.
Panels giving parents a right of redress were launched in 1987 by the then Conservative government but Shadow Education Secretary Damian Green now admits they were a costly mistake and wants them scrapped.
'They are ludicriously expensive, lengthy and bureaucratic - a waste of money,' he said.
'We need a general policy of having proper home/school contracts available to heads so that parents know from the outset what is expected of them and their children and would not see a discipline issue as the school's problem and not theirs.'
DfES officials will also now look at ways that education authorities can intervene in cases like Ewell and Coventry.
'We have had concerns for a long time about the way that the panels operate,' said a senior education department source. 'We have to send out the right message that if you behave disgracefully at school then you cannot get away with it.'
But the official said that although they wanted to review the operation of the panels, they would not be disbanded because it would be 'a field day for lawyers'.
'The only recourse parents would have would be to the courts, which would be prohibitively expensive,' he said.
The row can only add to the continuing headache being suffered by Morris over the A-levels grade-fixing scandal. On Tuesday the results of the 300,000 regraded papers are due to be couriered to schools and colleges around the country.
A high percentage are expected to have been dramatically upgraded.
Mike Tomlinson, heading the independent inquiry into the fiasco, will make a statement on the outcome of the regrading but is not due to report in full until November, when Ministers may face criticism for pushing through Curriculum 2000 against the advice of the examining bodies, unions and many teaching professionals.
'It is the most serious blunder for Estelle Morris,' said Damian Green. 'The clearest example of ministerial culpability there is.'
