I literally know like ten people who went to Ghana for some sort of volunteer work, mostly teaching kids English or something of the like. Why is Ghana so popular? Why not Nigeria or Tunisia or something? And besides, Ghana already has one of the highest school enrollment rates in Africa.
First of all, Ghana is a relatively easy place to get visa
Second, it’s a safe and stable country that is not in the middle of a civil war like Nigeria
Third, they are an English speaking country so you don’t need to know a foreign language to volunteer there. To volunteer in Tunisia you would need to speak French and/or Arabic
Fourth, they have developed an infrastructure for supporting volunteer opportunities