Systems and methods for verifying the presence of an attendee in an education session include providing, by a computer hardware processor, information for a codified sound to a leader of the education session, where the leader is located in a substantially enclosed space in which the education session is held. The codified sound represents a leader code. The codified sound is emitted from a first device associated with the leader. A sound signal is received by a second device associated with the attendee. An attendee code is determined from the sound signal received by the second device. The system, such as using the computer hardware processor or the second device, determines whether the attendee code matches the leader code.