Schools are struggling to recruit teachers ahead of the start of the new term in September.
The website Education posts.ie says it's currently advertising 1140 jobs.
643 posts are advertised for primary schools, while there are 456 vacancies in secondary schools.
Principals blame the rising cost of living and ongoing housing shortage on the recruitment crisis.
Labour's Education spokesperson, Aodhán Ó Riordáin, and former primary school principal, says the Department of Education isn't doing enough.
"There are solutions out there. We've spoken to the Labour Party about the Dublin Allowance that would encourage more teachers to be able to live in Dublin. But certainly, this is a problem that the department hasn't grappled with at all. As a result, schools can't staff themselves, and children are not going to be able to be educated by trained teachers come September."
" A huge amount of this is about tackling the housing crisis effectively and understanding that teachers should be able to live and work in Dublin. And unfortunately, that's not the case.
"We've spoken in terms of a Dublin allowance that would mirror what happens in London. It's not the entire solution, but it would certainly help."