Hampshire County Council's education chief says schools failing to achieve the floor target of 55 per cent good Sats passes in English and maths combined is a priority.
Cllr Roy Perry, executive lead member for children's services, however praised the improved pass rates for the 2010 primary school leavers sitting their Key Stage 2 exams.
This year, Hampshire year six pupils achieved overall 82 per cent pass rates in both maths and English individually, and 76 per cent combined - all several percentage points above the England average.
Cllr Perry said: 'Hampshire pupils generally achieved high levels in all areas of assessment and standards remain consistently above the national averages.
'The high standards in English have been maintained, standards in maths have continued to improve so that they now equal attainment in English, and in the important measure of level 4 and above in maths and English combined, the percentage has also continued to rise.'
He added: 'It is obviously disappointing to see that at some schools pupils are not performing as well as we would hope.
'Raising school performance above the floor target of 55 per cent in English and mathematics combined continues to be a focus for the local authority school improvement teams who are working with schools to raise attainment levels and help them ensure that children make two levels of progress in curriculum subjects.
'Indeed there has been a significant reduction in the number of Hampshire schools achieving below the floor target levels between 2009 and 2010.'