My younger bro was asked by his teacher to pay for the waec customised maths set in his school which we already bought from the lesson he attends.since he goes to a govt school we reg him for a lesson else where.and we were asked to pay for that which we did. and now according to him the school just brought theirs and asked them to pay or else no exam number for them.he has tried explaining to the teacher who refused to understand.he just came back today and told us that his classmate who has not paid was not allowed to write her exams.i'm thinking of confronting him but i need to be sure.must he buy again from the school?

No.. Weac gave it out for free..