These are actually required for all Bible College Students in Calvary Chapel Bible college to complete during their stay. They get the student version which is sped up 1.5x speed though. This version is the o.g. version! These are the messages that you can hear on Pastor Chuck's radio program "The Word For Today" Monday through Friday at the normal speed. The MP3 files on the discs make uploading his entire library onto your computer a breeze. One of the greatest resources I've ever encountered for Bible study.