Playground by default allows teachers (staff) to clock-in/out using their PIN code by selecting their name in the Faculty Directory or if a teacher/administrator device has been set into Kiosk Mode.
Administrators can also allow teachers to use their own devices to clock-in with a QR code scan or the Time Tracker by enabling an option in the administrator dashboard. This video will walk you through how to enable/disable that option.
Click here for an article that shows teachers how to locate their PIN code and use the Faculty Directory to clock-in. Click here for an article that shows teachers how to use the QR code and Time Tracker options.