"Teachers need ongoing professional development and the chance to see great teaching in their own schools and beyond to improve their lessons," she explained.
"The problem is not just one for the weakest schools. Too many schools tolerate pockets of poor teaching alongside good practice."
In terms of overall performance, inspectors judged 13 per cent of schools as outstanding, 43 per cent good, 37 per cent satisfactory and 8 per cent inadequate.
Of the 43 academies inspected 11 were outstanding, nine good, 20 satisfactory and three inadequate.
More than three-quarters of schools inspected this year either sustained their performance or improved since their previous inspection.
But 43 per cent of the 489 schools previously judged outstanding were no longer outstanding in their inspection this year.
Gilbert argued that the variation between different local areas is too high, since the proportion of good and outstanding schools ranges from 40 per cent in some local authority areas to 90 per cent in others.
Schools serving more deprived communities continue to perform less well than their wealthier counterparts, with 46 per cent of schools in the most disadvantaged areas judged good or outstanding compared to 71 per cent in better off areas.
In the early years sector, 10 per cent of provision was rated outstanding, 58 per cent good, 29 per cent satisfactory and three per cent inadequate.
Of the childcare providers that were found to be inadequate in 2008/09 and have since been re-inspected, 95 per cent are now satisfactory or better.
Childcare in non-domestic premises, for example nurseries and playgroups, was slightly better on average than provision by childminders.
But this difference was found to be greater in disadvantaged areas, with 52 per cent of childminders in the most deprived areas rated good or outstanding compared to 71 per cent in wealthier areas.
The number of providers in the early years and childcare sector has continued to fall. Inspection evidence shows that a high proportion of ineffective providers have left the system since the introduction of the Early Years Foundation Stage.
The first inspections of children’s centres show that outcomes for children and young people were good or outstanding in 24 of the 39 settings inspected.
Overall five children’s centres were rated outstanding, 17 good, 13 satisfactory and four inadequate.
"The report has much to celebrate," Gilbert said. "However, more needs to be achieved. In an increasingly competitive world economy we do not have the luxury of complacency.
"We must be relentless in the pursuit of the highest standards for all young people and adult learners – the best possible start in life with high quality childcare, the best teaching and the best training and social care the vulnerable can rely on."
Leslie Forsyth, interim director of operations at the National Childminding Association (NCMA) said more must be done for childminders in deprived areas.
He said: "More must be done to support childminders in deprived areas to improve their quality of care, so that all children have access to the same opportunities regardless of where they live."NCMA welcomes Ofsted’s acknowledgment in this report of clear evidence that childminders who are part of quality assurance schemes - such as childminding networks - are more likely to achieve good or outstanding grades."
