As an undergraduate, you can turn a course-ware into a Mobile App. Host with Google play and MTN APP market.
Recommendations
1. Target courses with about 1000 students and above (Usually year 1 courses)
2. Sell at a cheap price (#100-300)
3. Target public universities, both Federal and State. I cannot really tell for Private universities (not sure of their yearly intake)
4. Liaise with older students of the chosen department to help with promotion.
5. Create for ANDROID, IOS and BLACKBERRY
6. Target when schools are about to resume
7. Be the first to create it, otherwise you will have to make yours better, and do more aggressive marketing

How to create the App
1. Get the course-ware
2. Develop the topics using the internet
3. Create the App (To learn how to create ANDROID and iPhone Apps in Days send email to ambaconcepts@gmail.com)
4. Host your App
5. Publicize.