How many years do Nigerians attend school?

In Nigeria, the standard education structure includes six years of primary school, three years of junior secondary school, and three years of senior secondary school. Some schools may offer additional years of education, such as pre-primary or nursery school, but these are not mandatory. Therefore, the total number of years Nigerians spend in school before completing secondary education is 6 + 3 + 3 = 12 years.