Honestly dear your school will not let you be irregular, because of their official attendance record. But it's true to manage time properly and devote yourself into studies you cannot be that frequent to visit your school. Always keep in mind the minimum attendance criteria and have a good relation with your teachers, who would help you to manage time. Make a proper schedule of going to school and take break on the days when you don't have important classes. This would not affect your focus and concentration.

Good luck!!