I must say that I have not had this situation arise yet and I hope it never does. I have, however gotten a few parent phone calls and emails about their child’s progress in my class. I have more students that simply won’t do the work assigned to them than I have students who do poorly on tests. I do, however, have a robust plan in place if such a moment arises.
The good news is that by using a learning Management System called Edmodo, I am able to stay in direct contact with students (And their parents/guardians if they choose to sign up for a parent account)and it is a one stop shop for due dates, deadlines, study guides, helpful links, etc. This is by far, my biggest defense to such issues. Once a parent sees exactly what their child is doing, or NOT doing for that matter, this usually quells even the most protective of them. Once they can see first-hand that the fault lays with their child and not with me, then that takes the wind out of their wings so to speak.
As far as the testing results go, the good news is I adhere to ALL IEP and 504 accommodations , along with providing study guides and ample warning on the content of each test/quiz well before it actually occurs. It also helps that I always give my quizzes on Fridays nearly every week of the semester so there can be no confusion as to how or why a student did not do well on the test.