Image caption Noelle Buick said schools were putting concerns about league tables before the best interests of the pupils

Northern Ireland's chief inspector of schools has said too many pupils are not getting a good enough education.

In her latest report, Noelle Buick said that those from socially disadvantaged backgrounds were particularly affected.

She also expressed concern over how children are taught, pointing out that about one fifth of lessons were "less than good".

However, she acknowledged that a number of areas of education had improved since her last report, in 2014.

The Education and Training Inspectorate (ETI) observed more than 11,000 lessons and training sessions in Northern Ireland over the past two years.

Image caption Ms Buick said that those from socially disadvantaged backgrounds were particularly affected

While the majority of early years, primary and post-primary schools were doing well, a significant number of children were "accessing education that is not good enough", she said.

She said that about eight out of 10 primaries and seven out of 10 post-primaries were providing "high quality education".

However, that meant that "just over 78,000 children may not be getting a good enough education".

It cited reasons, including "a variation in standards across individual subjects, low teacher expectations and uninspiring teaching".

Image caption The report said it was unacceptable that boys continue to under-perform in exams, when compared to girls

While she said most schools had good management, she was critical of the leadership in some grammar schools, saying it was "less than good" in a quarter of them.

That compared to poor leadership in only one in 10 non-grammar schools.

Her report also said it was "unacceptable that boys continue to under-perform" in exams, compared to girls.

In 2014-15, four out of 10 boys in non-grammars got at least five GCSEs at grades A*-C, including Maths and English.

That compared to just over half of girls in non-grammars.

Other key findings

Teachers teach well, but "concerns persist in around one-fifth of lessons observed in primary and post-primary schools which were less than good"

The quality of lessons in a third of school science departments is "less than good"

The relatively low numbers of pupils studying modern languages "remains a major concern and challenge for Northern Ireland"

Around 2,000 year 13 pupils drop out before year 14, while around 1,600 year 12 pupils (around seven per cent) are excluded from their school's GCSE performance statistics

Ms Buick blames the above trend partly on schools having fears "over the position of the school in league tables published by the media [rather than] the best interests of the pupils".

She concluded that, while progress has been made in many areas, improvement will only come with more joint working between government departments and between schools and parents.