Improvements are needed to ensure children leave school fully equipped with computer skills, according to MP Norman Baker.
The Lib Dem MP has carried out a survey of the 19 schools in his Lewes constituency.
He says 70 per cent of primary schools do not have a computer suite and 59 per cent do not have a computer specialist.
The schools themselves suggested that funding for on-site technicians and support-staff should be priorities.
Mr Baker said: "There is no point the Government hitting its target of getting every school online if there is only one connection per 20 pupils.
"Children may leave school disadvantaged unless schools and teachers enjoy the funding, support and expertise to repair and maintain IT equipment.
"Every child has the chance to become a computer whizzkid. We cannot allow the underprivileged, who may not have a computer or internet access at home, to go without proper skills training."
The Lib Dems say they would establish local educational IT trusts, charitable companies which would take over many IT functions from local education authorities.
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