At the most basic level, the activities of this component track student attendance at the classroom level and teacher attendance at the school level. That process, when performed period-by-period, can also be used to confirm whether the teacher assigned to the course section is the one who taught the students during that period or day, as well as whether or not the student was present for the class. This information is vital to the TSDL — it can point out instances when another teacher has delivered course content and whether or not the student was present during the delivery of instruction.