Education in Nigeria is based on a 6-3-3-4 system, which involves three levels of institutional learning process which are at the primary school level, at the secondary school level, and at the tertiary level. Girls in Nigeria go to school for an average of 8 years while boys go for an average of 10 years. The primary school age in Nigeria is 6 to 11 or 12 years old and the secondary school age is 12 to 17 years old.