The number of teachers under the age of 45 working in Scottish schools has increased by 26% in the last decade, according to official figures.
Posters warning pupils not to physically or verbally attack teachers have been produced by a union amid fears for staff welfare.
Almost three out of five full-time teachers say they are working the equivalent of an extra day or more each week.
Calls for teachers to cut the time they spend in the classroom to 20 hours a week or less are to be debated this week.
A culture change is needed at schools over how teachers are able to progress their careers, according to a union.
The number of teachers suffering with their mental health is “extremely worrying”, the Education Secretary has said.
A union chief is to call on teachers to take “take back the profession from the bureaucrats and bean counters”.
Almost two-thirds (64%) of teachers in Scotland say their mental health has suffered because of their work in the last year.
An MSP has told teachers she “wouldn’t do your job for all the money in the world” at an event discussing violence in the classroom.
Children as young as 11 are taking photos up teachers’ skirts, a union has claimed.
More than two-thirds of teachers responding to a union survey have said they believe poor pupil behaviour is a widespread problem at their school.