Last month Google released a handful of updates to Google Forms. Today, two more features were announced. Both features were designed with teachers in mind.
Beginning today you can add feedback to each question that you grade through the quizzes feature in Google Forms. To do this use the “question by question” grading option in Google Forms and then enter your written feedback in addition to numerical feedback.
Coming soon you will be able to import grades from quizzes given in Forms to their Google Classroom gradebooks. Google wasn’t clear on what “soon” means, but I’d guess that this feature will be available later this month.