First Minister Nicola Sturgeon has said she would prefer to have "more teachers, not fewer", amid reports 800 could be cut in Glasgow to save money.
The Daily Record, reporting on a leaked document on Thursday, said SNP-run Glasgow City Council is also considering shutting primary schools early on Fridays in a bid to save £51 million from its education budget.
Teaching unions said they are "desperately worried" about the proposals, warning they would have a detrimental impact on the city's young people.