yes you can do that if a school allows you but I don't think it is not beneficial because you are missing school you are not doing coaching then what purpose of sitting idle and just hoping that you will prepare on yourself better you should do regular schooling because it's a lifetime opportunity and you will learn something apart from academic there are many things which can be learn from the school only and it is the age at which you should go to school if you are free therefore I would like to suggest you that you should not miss this school and if you are doing so then you had to coaching as there is no point in missing school