If you have upgraded your free Quizlet account to Quizlet Teacher, you will have access to aggregate class progress on sets that you create. You can see which terms your students need the most help with and direct your in class teaching to focus more on the hard terms or concepts.
You can access teacher view from any set that you have created via the "Teacher" tab. This tab will show up between the "Scores" and "Info" tabs, as long as you are logged into your upgraded Quizlet Teacher account.
You can choose to filter the most missed terms by class and by time period (past day, past week, past year).
Individual Studying Activity
From any class page, click "Members" to see a list of all your students.
And then select the specific student you'd like to view by searching by username.
Clicking on their username or icon, and then "Studied" will take you to that student's profile. There you can see a list of all their recent studying activity.