To become a teacher in Nigeria, you will need to follow these general steps:

1. Obtain a Bachelor's Degree in Education or any related field from a recognized university. Most universities in Nigeria offer degree programs in Education.

2. Obtain a teaching certificate from the Teachers Registration Council of Nigeria (TRCN). The TRCN is responsible for regulating the teaching profession in Nigeria, and it is mandatory for anyone who wants to teach in Nigeria to register with the TRCN.

3. Gain teaching experience by completing a teaching internship or by working as a substitute teacher.

4. Apply for teaching positions in schools or educational institutions. You can search for teaching vacancies on job boards, educational institutions' websites, or by contacting schools directly.

5. Attend job interviews and demonstrate your teaching skills and knowledge.

6. Once you secure a teaching position, continue to develop your teaching skills through professional development and training programs offered by educational institutions and professional organizations.

In summary, to become a teacher in Nigeria, you need to have a Bachelor's Degree in Education or a related field, obtain a teaching certificate from the TRCN, gain teaching experience, apply for teaching positions, attend job interviews, and continue to develop your teaching skills through professional development programs.