Three out of four schools were unable to attract any applicants for advertised teaching roles last year.
Too many children are missing out on a full range of subjects at school.
The Teachers' Union of Ireland says Government inaction is having a hugely damaging effect - with teacher retention now as big a challenge as teacher recruitment.
TUI President Anthony Quinn says a recent survey found 75% of schools advertised positions last year - for which no teacher applied.
General Secretary of the TUI, Tullamore's Michael Gillespie says the country is losing teachers due to lifestyle and workload issues:
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