I come from a family of educators-teachers, librarians, guidance counselors and administrators. If someone was writing in my 8 year old grandson’s planner-where he could see them- the types of comments you have shared, I would be very unhappy. My advice is to schedule a conference with her and an administrator and get some answers. Nothing you have said seems to justify having him repeat second grade-there is so much you and the school can do before next year, I don’t know why she would even bring it up? And I would have him tested independently.