A quarter of all secondary school teachers are giving lessons without having the proper qualifications, the Nederlands Dagblad reports on Friday.

In total, some 25,000 teachers don’t have a teaching certificate, the paper says, quoting education ministry figures.
The number of vacancies in primary and secondary education has gone up 30% this year, says researcher Marc Vermeulen.
While unqualified teachers are not allowed to teach in primary schools, they can give lessons in secondary schools as long as they following a training programme.
Checks are carried out randomly, an education ministry spokesman told the paper.