New figures have revealed more than £9 million has been spent on supply teachers in the North-east.
A freedom of information request has shown in 2016/17 Aberdeenshire Council spent £7,318,401.32 on bringing in supply teachers to schools in the area, the highest total in the North-east.
This compares to the £1,964,882 spent by Aberdeen City Council.
In addition, the city council had to re-advertise 132 teaching posts – down from 146 in 2015/16 – while Aberdeenshire Council re-advertised for 121 posts, which was up from 55 a year earlier.
North-east Liberal Democrat MSP Mike Rumbles said: “These figures confirm what many people in the North-east already know.
“Many hard-working teachers feel undervalued and unappreciated. It is no surprise our local councils are having trouble filling teaching posts in our schools.
“We need a proper review of teachers’ pay and conditions if we want Scotland to have a world-class education system again.”
An Aberdeenshire Council spokeswoman said: “Supply figures have reduced slightly in Aberdeenshire during this academic year and there is a limited pool of supply teachers.
“However, there is a well-documented national challenge in recruiting teachers which is reflected in the use of supply teachers and the re-advertisement of vacancies in Aberdeenshire.”
An Aberdeen City Council spokesman said: “While there will be a number of factors influencing the figures, one of the main drivers will be the success we have had recruiting full-time teaching staff.
“Clearly, with more people filling full-time posts, the demand for supply teachers decreases.
“We have undertaken a number of initiatives in the last year to make Aberdeen a more attractive prospect for full-time teachers.
“We are not where we want to be just yet and will look at other ways to maintain the trend of improvement.”
A Scottish Government spokeswoman said: “Although teacher recruitment is a matter for local authorities, education is this Government’s number one priority which is why we are taking decisive action and investing heavily to help recruit and retain teachers.”