So, I'm looking for icon of school grade, like this, for example

Does format-annotation-plus not work?
@augustin32, the width between the text and side of the document is not 2 pixels.
@MrGrigri, sorry for that, but without 1 pixel space, the icon is unreadable at 1x resolution
Correct, that's why I have asked @TheChilliPL, if format-annotation-plus would work. I do not believe that his suggestion of a file + 'A+' will work with MD.
@MrGrigri, from now i will be more accurate with guidelines and search for alternatives that already's on the site, thanks :)
I just want to remember, that not all countries use letters for grades...
File + percent could work though.
@Ch-Lo that's another reason why I don't believe that his suggestion would work. @JapanYoshi, I do believe that would work.

UK did when I was sitting exams but now they are switching to numbers and we already use numbers for university degrees. Localisation is always an issue. #1240
Okay, format-annotations-plus will work ;)
But wait a second, I'm learning how to make icons, and I made pretty nice icon for it, I will upload it in a moment
Alright, "A" letter looks a little bit strange, but anyway - here it is
Those letters aren't according to Material Design specifications.
Whoops
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I just want to remember, that not all countries use letters for grades...