NOTE - All of these lessons deal with using Google Forms to create a form that is used as a survey. If you would like to use forms to create Quizzes, you need to look at the Form lessons in Green Level 2.
Collecting data from a form is one of the primary functions. Create an exit ticket to use with your class that will collect information like (name, period, and some kind of question that checks for understanding). Post the link to this form in your Google Classroom as "material". Have students access this link as they prepare to leave your class when you would like to collect info on their understanding. Using this as a part of a routine would seem to make the most sense.