Student data is saved every three minutes, each time a student finishes a level (successfully or not) and, when a student signs out of ST Math.
Student data is synced upon educator sign-in or when the browser is refreshed. Weeks start on Monday, so minute and puzzle counts reset every Sunday at 11:59 pm, local time.
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.