"During the year, we have seen a number of schools with serious shortcomings [in these areas]," the inspectorate's general director Helén Ängmo said in a statement posted on the body's website, accompanying its annual report on the state of Swedish schools.
Ängmo said that the failings were similar to those identitfied by the inspectorate in previous years. The increased scope of this year's report adds weight to its findings.
"For example, schooling is often conducted at a middle level, which works well for some children, but far from all pupils. Every student should receive schooling based on their own abilities and needs," said Ängmo.
The report highlights failures in terms of making pupils feel safe at school, and on creating an atmosphere suitable for studying. The inspectorate points out, however, that many schools have introduced successful teaching methods in the past year.
The report echoes concern over Swedish schools, which have also performed poorly in recent PISA rankings.