In Uganda, O-Level refers to the Uganda Certificate of Education (UCE), awarded upon completing four years of lower secondary school. It is comparable to the GCE O-Level in the United Kingdom

O-Level education follows the Competency-Based Curriculum (CBC), which focuses on developing practical skills, fostering critical thinking, and applying knowledge in real-world contexts.

O-Level in Uganda begins at Senior One (S1), equivalent to 7th Grade in the international education system. Students typically enter S1 after completing their Primary Leaving Examination (PLE) in Primary 7. It serves as the foundational year of secondary education, introducing a broad range of subjects and transitioning from primary-level learning.

Senior Two (S2), equivalent to 8th Grade, builds on the foundation laid in S1. This year emphasizes subject depth and critical thinking, serving as a formative stage in secondary-level education.

Senior Three (S3), equivalent to 9th Grade, is a preparatory stage where students start to specialize in certain subject combinations, particularly in preparation for the Uganda Certificate of Education (UCE) exams. Subjects are studied in more depth, and practical skills become a key focus.

Senior Four (S4), equivalent to 10th Grade, is the final year of O-Level. This year is intensive, with students mastering the core concepts of their chosen subjects, both arts and sciences. It culminates in the UCE exams, which determine eligibility for Advanced Level (A-Level) or vocational studies.