In Nigeria today, an average student requires money to take care of small financial needs during the course of his/her study. From universities, polytechnics, mono technics, colleges and even secondary schools.

FREELANCING
Every sectors and industries are looking for freelancers to hire for their project, because is is more cheaper than an in-house professional. This money making opportunity is inexhaustible and also easy to cash in even if you are on a beginner level.

CREATING VOICE OVERS
Businesses and individuals are looking for unique voices as voice overs for their projects which ranges from video games, TV and radio commercials, online commercials, animations, instructors, narrators etc.

More details and explanations here
https://jobverion.com.ng/how-students-can-make-money-in-nigeria/