Finding substitute cover has become one of the most persistent operational challenges facing Irish schools. For many principals and deputy principals, the day can begin with checking messages, ringing through known substitutes, posting into groups, waiting for replies, and hoping a class is not left uncovered.
The pressure is visible in sector research
This is not simply a matter of inconvenience. Recent sector research links substitute cover pressure to classroom disruption, pressure on special education provision, and the sustainability of school leadership.
According to INTO / IPPN / CPSMA research published in November 2025, 565 schools responded to a teacher supply survey. The report recorded that 19% had not been able to fill all vacant permanent, temporary and long-term substitute positions, with 234 reported vacant posts in primary and special schools.
The short-term cover picture is just as challenging. The same survey found that 60% of responding schools had been unable to source a substitute for an absence. In September alone, 56 schools reported ten or more days when they could not get a substitute.
Unfilled cover creates disruption elsewhere
When a substitute cannot be found, schools still have to open classrooms, supervise children, and maintain learning. That often means splitting classes, redeploying Special Education Teachers, or relying on people who are not fully qualified teachers.
According to the INTO / IPPN / CPSMA survey, 215 schools reported splitting classes, resulting in 735 days of disruption to children's learning in the first six weeks of the school year. It also found that 65% of schools had redeployed a Special Education Teacher to cover for an absent class teacher.
The causes are wider than school effort
The problem is not caused by a lack of effort from schools. IPPN's working paper on teacher supply identifies a wide range of contributing factors, including housing costs, unattractive short-term or part-time vacancies, lack of flexibility and mobility in the sector, increased demand for substitute teachers, and the number of leave categories that require cover.
That is why substitute management needs to be treated as more than an admin task. It is part of school continuity planning.
Smarter cover management starts with visibility
A smarter system cannot create new teachers overnight. But it can help schools make better use of the substitute teachers who are available.
The first step is visibility. Schools need to know who is available, when they are available, what classes they are suited to, and whether they are already known to the school.
Speed and records matter too
The second step is speed. A substitute request should not depend on repeated phone calls or manually copying the same message across multiple channels. Schools need a way to send a structured booking request quickly, prioritise preferred teachers, and receive confirmation without unnecessary back-and-forth.
The third step is record-keeping. Substitute cover affects absence records, payroll reporting, work history, and future planning. A centralised system makes it easier to see what happened, who worked, when they worked, and where gaps are appearing.
Where Subber fits
Subber is designed around these needs. Schools can check teacher availability, create booking requests, shortlist preferred teachers, receive confirmations, and reduce the time spent manually chasing cover.
The teacher supply challenge in Ireland will require long-term policy solutions. But schools also need practical tools now. Reducing the daily scramble for substitute cover gives school leaders more time to focus on teaching, learning, and supporting children.
