Failing to get good marks.
Around 7% were classed "inadequate" by inspectors from Ofsted.
And 37% were judged by inspectors to be only "satisfactory".
It means that overall, some 44% of 2,016 schools in England inspected last autumn were given a grading below "good".
Some 46% of inspected schools were judged as "good" and 10% were found to be "outstanding".
Ofsted said that following changes to inspections introduced two years ago, it is now focusing on inspecting weaker schools.
Since last September, Ofsted has not inspected schools rated as outstanding unless there are specific reasons to do so. Only a small proportion of schools judged as good were inspected.
Ofsted chief inspector Christine Gilbert said: "Ofsted's current school inspection arrangements set out to be more challenging to schools, so it is encouraging to see 56% were judged good or outstanding.
"Greater involvement for head teachers and senior staff in the inspection process, more observations of lessons and fuller recommendations for improvement mean this framework is helping ensure schools understand areas for development and action more clearly."