000102030405060708091011121314151617181920212223SundaySaturdayFridayThursdayWednesdayTuesdayMonday
0.0050.010.0150.020.0250.03Share of TimeTime (Local)Figure 5: Platform Usage TimesNotes: The x-axis shows hours of the day (in teachers' local time zones), while the y-axis shows days of the week.Each square represents a specific day-hour combination, with color intensity indicating how much time teachers spend usingthe platform during that time slot. Usage time is measured using "runs"—continuous periods when a teacher interacts witha single platform feature before switching to another feature or ending their session. To ensure accuracy, we cap unusuallylong runs at 2 standard deviations above the average duration for each feature type, and exclude teachers' final runs of eachday (since we cannot observe when they actually stop using the platform), unless it was their only activity that day.