What would you say to an angry parent about their child’s grade?

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I tell them to take care of their children, to raise them and to care for them in ways and ways of criticizing the meaning of making your child know the mistake of right,

The grades isn't the scale and balance of success. Supporting this idea with success story of non high grades people but changed the world.

The usual things - why the grades are low and what reasons are 

Without being defensive, educate them on how your program works to protect every student’s right to learn and enjoy school. Be open, inviting, and personable, and they’ll walk away impressed with you and the way you run your classroom. Whether or not you’re directly responsible for why the parent is angry is irrelevant. Take responsibility anyway. It’s the fastest way to diffuse their anger and is the right thing to do–for them and for you. Simply say, “It’s my responsibility and I’m going to take care of it.” When you take responsibility, it’s only natural, and befitting, to apologize–even if you don’t entirely see things their way. You might say, “Hey, I’m sorry you had to come to me with this.” Or “Gosh, I’m really sorry this happened.” Often, that’s all a parent wants to hear. End your conversation by reiterating that you’re going to take care of the problem. But this time be specific. Say something like, “Rest assured, I’m going to see to it that Anthony doesn’t bother your daughter during reading time any longer.” And then do it. Don’t let it wait. Fix the problem as soon as you’re able. After you’ve taken care of the problem, contact the parent to let them know. There is no reason to apologize again. And there is no need to go on and on. It’s over and time to move on