You can track staff hours two ways:
Timeclock - the staff can use the timeclock just like the parents. This will automatically update to the Staffing tab > Staff Hours. Staff can either clock in and out for breaks or they can choose their break time when they clock out.
Staff Hours - in the Staffing tab > Staff Hours, you can manually keep track of staff start and end times, absences, etc. To enter in times for staff, you would click on the Actions drop down across from their name and select Start. Then to enter in their end times you would select End. If you wish to do this in a group you can select their names and select Group Start or Enter In/Out Times. To enter in their end times you would select Group End.