Data is saved each time a student finishes a level.
Student data is synced upon educator sign-in or when the browser is refreshed. Weeks start on Monday, so student data rolls from this week to last week on Sunday night at approximately 11:59 pm, with Monday morning student data starting with 0 minutes and 0 puzzles.
Note: It may take data longer to load when adding students to a class. Large numbers of students being uploaded can take upwards of 30 minutes.