Do you mean Nigeria Certificate in Education (NCE), there many schools that are running this programs in Nigeria, you will need to specify which state you will like to go in for the programme or i will just give you list of schools currently running this programme. Another thing again is in which area of study are you interested in, is it in Arts and Social Sciences, Science, Languages and finally Education.
Here is a few schools that offer the NCE programme
1.Ahmadu Bello University, Zaria, Nigeria
2.Osun State University Nigeria
3.Adeniran Ogunsanya College of Education
4.University of Port Harcourt
5.Emmanuel Alayande College of Education, Oyo
6.FEDERAL COLLEGE OF EDUCATION, KANO
There are more schools that do this, you can add if you know any.