Climb Mt. Brandon


Christmas Wreaths

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TY Christmas Wreaths


TY Activities

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Junior Cycle Coding on New Laptops


TY Activities: Reptile Zoo Visit In


Business Students with Veolia


Proud Principal Mr. O' Sullivan


Here in Grennan College we are so very proud of our wonderful staff and students. We look forward to welcoming our new 1st years for their entrance exam on February 12th and wish to share a video showcasing our vibrant school community.

Calculated Grades Model: Guide for Parents Guide for Students

Office 365 Email & Teams App 

Principal’s Address

As a centre of education, we endeavor to promote all aspects of students’ development – personal, academic and experiential. This is done through a caring, pastoral and motivating environment. For every student, the primary aim is to be the best that they can be in all that they do.

Grennan College is a community of people – staff, students, parents and associated groups – working to achieve the highest level of accomplishment for all of its students. In order to reach full potential, the most important need must come from within the student; guided, encouraged and nurtured by teachers, management, parents and peers.

The core of learning is competency in literacy and numeracy – these two principles are key factors across all subjects.
Each student is responsible for his/her own learning and progress. Balance of participation in all activities is important. Extra-curricular activities should be balanced against academic pursuit – there is room for both, but not to the detriment of the primary goal – academic fulfillment.

We are a caring school, with each individual student’s development, progress and welfare at the core of all that we do. Work with us in your time here and you will succeed.

Go n-éirí an bóthar libh go léir.
S. O’ Sullivan (Principal)

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