This time, it’s an exploit that involves abusing the quiz results feature of Google Forms. It is both clever and dastardly — clever, because the exploit is subtle and complicated.

You can use Google Forms to create online surveys, quizzes, and feedback pages. Here’s how.

Google Classroom currently has more than 10 million active student users, according to Jonathan Rochelle of the Google EDU team—which means that one in six classrooms in the United States use it, he ...