The first day of school is hard for anybody and it's worse for teenagers that are trying to fit in. This is a great activity for the first week of school because it accomplishes several things:
1) it allows two classmates that would otherwise have not talked to get to know each other
2) it gives the interviewer choice as to what questions to ask
3) they practice presenting to the class without just reading
4) they have to change the questions to direct it to the interviewee
It works great for teenagers and you can easily modify it for other grades too.