More than 60,000 students have received the results of their Junior Certificate exams today.
Overall, marks for most subjects are in line with previous years.
This is the first year that the new Framework for Junior Cycle has been examined, in one subject only, English.
Both the assessment and grading systems for the subject have changed as a result.
There are no longer A, B or C grades in English, with students instead receiving one of six "grade descriptors", such as a Distinction, Merit, or an Achieved.
Marks are awarded not just for the exam completed in June, but also for assessments that took place in class during the school year.
In maths and in Irish a trend which sees more students opting for higher level papers continues.
This year also sees the demise of one subject as typewriting has been discontinued.
The subject with the lowest numbers now is Ancient Greek, which just 26 students sat this year.
The results will be available from schools over the course of the day and online at examinations.ie from 4pm.
The President of Teachers' Union of Ireland has said the union will be monitoring the results of the English exam.
Speaking on RTÉ's Morning Ireland, Joanne Irwin also welcomed the OECD findings that 91% of pupils in Ireland will complete second-level education, considering that the OECD average is only 68%.
She said more than 600 adults who have returned to education are getting their results today.
The principal of a DEIS school in Cork has said smaller class sizes and hour long classes have led to better Junior Cert results for his students.
Kevin Barry, of Deerpark CBS in Cork city, said his students performed better this year in STEM subjects.
"Our mathematics and science has really gone up. We can see that there's a solid link being established in our research between small class sizes and moving to hour long classes and our set of results."