YOU SAID:

How to prevent school grades from being viewd by parents until I hack the grades.

INTO JAPANESE

私が学年をハックするまで、学校の学年が親から見られるのを防ぐ方法

BACK INTO ENGLISH

How to prevent school grade from being seen by parents until I hacked the grade

INTO JAPANESE

学年をハックするまで、学年が親から見られないようにする

BACK INTO ENGLISH

Try not to see the grade from the parent until you hack the grade