Express and Special stream students are graded along the Overall Grade grading system for the first 3 academic years in their secondary schools, and then graded along the O Levels grading system in their final secondary school year (year 4). Normal (Academic) students are graded for first 3 academic years and the N Levels year (year 4), and subsequently graded along the O Levels grading system in their final secondary school year (year 5). Normal (Technical) stream students are graded along the Overall Grade grading system throughout their entire education in secondary schools.