13. The computer system of claim 11 , wherein the software is further configured to determine the total number of words recited in the displayed text.
11. A computer system configured to generate an evaluation of playback of a presentation, comprising: a first computer having a non-transitory memory; software stored in the non-transitory memory configured to cause the computer to: store a first video file on a computer storage medium, wherein the first video file includes a first video having a total duration time and an audio track on which a plurality of words are recorded; receive a digital file comprising the text of the words recorded on the audio track; transmit the first video file to a second computer; receive from the second computer data identifying the duration of time that the first video was viewed; calculate the percentage of time the first video was viewed by dividing the total duration time of the first video by the duration of time that the first video was viewed; display on a computer display the text of the words from the digital file; depict a graphic element on the text indicating the duration of time that the first video was viewed.