[sb] be ADJ of ~
When it comes to grammar, many writing tutors and instructors are unsure of the most effective way to teach ESL students.
Many educators are unsure of how to refer to students whose first language is not English.
It’s up to you ~ ～はあなた次第
It’s up to you to ensure that that doesn’t happen. そうならないようにするのはあなた次第です。