Teachers’ union leaders are warning that teacher shortages are costing schools hundreds of millions of pounds in temporary supply staff.
The National Union of Teachers says schools in England spent £733m last year on supply teacher agencies.
The union says it is wasting money intended for children’s education.
Education Secretary Nicky Morgan is launching a TV recruitment campaign to attract a “new generation of passionate and gifted teachers”.
Head teachers have been reporting deepening problems with getting enough staff.
The Department for Education has launched a television advertising campaign to encourage more applications, saying that 35,000 trainee teachers need to be recruited every year.
There are particular problems in finding teachers in subjects such as physics, and the government is offering increasingly generous bursaries.
A physics graduate with a good degree can claim up to £30,000 tax free for entering teaching.
“Great teachers are at the heart of our drive to extend opportunity to every single child,” says Mrs Morgan.
“That is why we are