Only half the heads believed their staff were "truly confident" in teaching literacy, with the figure for numeracy falling to just 42 per cent.
The findings, based on responses from 2,135 primary schools in England and Wales, are published in a report by computer company RM. Schools were far less confident about meeting their literacy targets - 35 per cent expected it to be more difficult to hit than their numeracy target.
The survey found that most respondents (91 per cent) felt more technological resources were necessary if standards were to rise.
Computers in literacy amp; numeracy in primary schools, phone 01235 826000 or website www.rm.com Online magazine