They're looking to restore equal pay for those hired after 2011.
The Teachers Union Of Ireland believe today remains the right time to stage a strike despite no government being in place.
The day of action is being taken in a row over pay for staff hired following 2011.
It's estimated it will take €36 million a year to restore equal levels of salary amongst those affected.
Various schools around the Midlands will be closed today because of the strike - with 400 shutting their doors nationwide.
Tullamore's Michael Gillespie Assistant General Secretary of TUI says they had no other choice but to go ahead with the action:
Further strike action could also be on the cards.
This teacher is on strike at Coláiste Dhún Másc in Portlaoise:
Pilot Programme For Parents Of Neurodivergent Children Launches In Laois
Midlands Simon Community Receives Major Funding
Emergency Services Call For Safety This Halloween
Midlands Homelessness Figures Continue To Rise
Westmeath Woman Wins Over €45k in Telly Bingo
Offaly Comedian Urges Men To Check For Testicular Cancer
Tánaiste Reviews Infantry Battalion In Westmeath Ahead Of Lebanon Deployment
Laois TD ‘Couldn’t Stomach’ Taoiseach’s Fine Gael Backing
Disruption On Midlands Train Services Expected This Weekend
Man Escapes Injury After Car Fire In Westmeath
Midlands Soldiers Taking Part In Latest Deployment To Lebanon
Popular Laois Forest Named In Coillte Top 20
Laois Author Recounts First Meeting With F1 Legend Eddie Jordan
Truck Driver Jailed For Five Years Over €2.8m Cocaine Haul
ESB Networks Invests €6.5m In Laois Training Centre
Offaly GAA Calls For End To Allianz Sponsorship
IFA Concerned Over Rushed Safeguard Approval For Mercosur
Westmeath Refuge Centres Step Up Support For Women And Children
Frightfully Fun Events Taking Place In The Midlands This Halloween
Social Finance Boosts Westmeath Boat Club