Asking about grades on tests sends the message to your child that your approval comes in grades as well. If your child did well, he or she will be thrilled to tell you without the question. If he did poorly, what does he expect your response to be? Will he get grounded, a privilege removed, extra homework time piled on? If he got a D, do you get a D in parenting?
Safest answer from a child: “We didn’t get it back.”