As I said, this problem has existed for a long time. In 1988 the maximum class guideline was 39 for a single grade, 38 for two consecutive grades and 35 for multi-grade. We have come some distance since then.
There are approximately 1,395 classes with over the 35 pupils. In many of those instances the principal and board of management take decisions on the organisation of the school regarding class size, which means one can have very large and very small classes in a school. For example, the principal may decide that the infants and higher infants' classes need to be particularly small, and therefore the fifth and sixth classes may be bigger. That is why one tends to get more than 35 pupils in a class.
In addition, there may be high class sizes in rapidly developing schools, particularly in urban areas undergoing population increase. This can be ameliorated in the following school year. If, because of its numbers or circumstances, a school is genuinely unable to reorganise its classes to accommodate the maximum class size guidelines, it can apply to the Department for additional teaching posts. An inspector will visit the school and make an assessment to satisfy himself or herself that the school can organise itself within the guidelines. The inspector can then recommend the allocation of extra posts. That is the procedure.