INTJ Isn't always a good student
I've seen posts upon posts upon posts about INTJ's being the student that teachers loved. That all INTJ's study hard, do well, and go on to be quite successful in their academic career. That didn't happen with me. At all.
My reasons why INTJ isn't as good of a student as everyone seems to think:
Teachers demanded we listen to them blindly, not just what to do in class and what homework to turn in, but the subjects we took. INTJ would have liked to have been asked what we wanted to study, not what some nameless, faceless, people decided we need to study.
If a subject doesn't interest INTJ, they don't try, end of story. If the purpose of a class wasn't communicated well, or at all, INTJ doesn't see the reason to be there.
Trust doesn't come easily. INTJ understands that this teacher is in fact a teacher, but they don't know you, and if they don't know you, they're sure as hell not going to trust you to teach them.
In class, it's rarely ever explained as a 'why'. The math is wrong? Why? We got the answer right, but you say we need to show my work? You mean you can't do it in your head so we're not allowed to either? Oh, we need to type up six pages on one subject that can be compacted into three pages? Why? There's nothing else to say.
INTJ's brains aren't always the most organized. Yes, we strive for perfection in whatever we do, but it's a messy process. It's not uncommon to space out in a class because INTJ is thinking about something.
Losing things happens. INTJ loses their phone while holding it. They misplace their glasses by wearing them. There are even days when they simply forget to sleep. And we have to keep track of, and do, homework for eight to twelve classes? Riiiight.
This is just my take on things, it doesn't apply to every INTJ, but I know it applies to a few.