Please post more details: Are you going to teach the kid privately? I mean, is it tutoring? Or do you teach him already at school?
What do you mean by "How to attract the boy's attention and make him behave during class exactly", tell me about his behavior, if there is any problem.
And last, if you are tutoring him, how many hours do you have weekly? Are you going to his house or the opposite?
I will wait for your reply and will be glad to give you some tips.