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All curriculum guides/Irish Leaving Certificate/Computer Science

IE · Subject guide

Computer Science

Leaving Certificate Computer Science (NCCA specification), Higher and Ordinary Level, with the SEC examination.

Editorially reviewed26 July 2026·Leaving Certificate
16Topic nodes
2Levels and pathways
1Regions
2Public references

Contents

  1. 01Overview
  2. 02Complete topic map
  3. 03Where this subject applies
  4. 04Official sources
  5. 05In-depth guides

01 · Overview

Computer Science

Leaving Certificate Computer Science (NCCA specification), Higher and Ordinary Level, with the SEC examination.

Subject guide
Leaving Certificate
Topics mapped
16

02 · Complete topic map

Complete topic map

Every topic recorded for this subject in the curriculum is reproduced below in its full hierarchy. The descriptions reflect the mapped scope without implying additional exam rules.

  1. 01

    Practices and Principles

    The overarching ways of thinking and working that computer scientists use, threaded through the whole course and applied within the other two strands.

  2. 02

    Computational Thinking

    Analysing problems in computational terms using abstraction, decomposition, pattern recognition and algorithmic reasoning to design solutions.

  3. 03

    Reading, Writing, Testing and Modifying Programs

    Developing fluency in one or more programming languages by writing, debugging, testing and adapting code to solve problems.

  4. 04

    Designing and Building Computational Artefacts

    Creatively designing and developing artefacts such as web pages, animations, simulations, games, apps and robotic systems.

  5. 05

    Computer Science and Society

    Considering the ethical, historical, environmental, legal and technological dimensions and societal impact of computing.

  6. 06

    Core Concepts: Abstraction

    Managing complexity by hiding detail, building models and representing problems and systems at appropriate levels of generalisation.

  7. 07

    Core Concepts: Data

    How data is represented, stored, structured, organised and managed, including number systems, data types, databases and big data.

  8. 08

    Core Concepts: Computer Systems

    The hardware and software making up computers, including processors, memory, operating systems, networks and the internet.

  9. 09

    Core Concepts: Algorithms

    Designing, expressing, comparing and analysing step-by-step procedures for solving problems efficiently and correctly.

  10. 10

    Core Concepts: Evaluation and Testing

    Judging the quality, correctness and fitness-for-purpose of solutions through systematic testing and evaluation.

  11. 11

    Computer Science in Practice

    Applying the practices, principles and core concepts through collaborative teamwork on four applied learning tasks that each produce a computational artefact.

  12. 12

    Applied Learning Task: Interactive Information Systems

    Building a system that collects, stores and presents information for users to interact with, such as a website or app drawing on a data source.

  13. 13

    Applied Learning Task: Analytics

    Gathering, processing and analysing data to extract patterns and insights and to present meaningful results.

  14. 14

    Applied Learning Task: Modelling and Simulation

    Creating computational models or simulations of real-world processes or systems to explore behaviour and outcomes.

  15. 15

    Applied Learning Task: Embedded Systems

    Designing and programming systems where computing is embedded in a physical device, such as robotics or microcontroller-based projects.

  16. 16

    Coursework: The Computational Thinking Task

    The SEC-set practical project carried out over the course, producing a computational artefact with supporting documentation, worth 30% of the marks.

03 · Where this subject applies

Where this subject applies

These pathways and regions are explicitly connected to the subject in the curriculum.

Levels and pathways

01

Higher Level

Higher Level — the more demanding level, with broader and deeper content and the H1–H8 grade scale.

02

Ordinary Level

Ordinary Level — the foundational level covering the core of the syllabus, graded O1–O8.

Regions

All registered regions

01IrelandThe Leaving Certificate is the terminal examination of the Irish senior cycle. Curriculum specifications are set by the NCCA (curriculumonline.ie) and the examination is run by the State Examinations Commission (SEC, examinations.ie). Most subjects are offered at Higher and Ordinary Level; English, Irish and Mathematics also offer Foundation Level.IE

04 · Official sources

Official sources

The public sources below are referenced directly by this subject or by one of its topics.

This editorial selection points to the relevant official bodies. Always confirm current requirements, dates and exceptional arrangements with your school and the responsible authority.

2
Public references

S·01National Council for Curriculum and Assessment (NCCA)Leaving Certificate subject specifications & syllabusesOpen source↗S·02State Examinations Commission (SEC)State Examinations Commission — Leaving Certificate examination & marking schemesOpen source↗

05 · In-depth guides

In-depth guides

G·01Your Leaving Cert study plan: an 8-week methodA realistic eight-week Leaving Cert study plan: an honest audit, subjects in rotation with active recall, orals and projects planned in, full papers to finish.8 min read→G·02How does the Leaving Certificate work? Papers, levels and gradingNCCA specifications and SEC exams, Higher and Ordinary Level, H1–H8 and O1–O8 grades, orals, projects and marking schemes: how the Leaving Cert fits together.7 min read→

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