This MP3 CD contains the entire audio recording of the course Exploring Creation With Chemistry 3rd Ed. If your child has difficulty reading, these are the perfect companions to the textbook or CD courses. Note: The CDs will work in a computer or a MP3 compatible CD player. It will not run in a CD player that is not MP3 compatible. The MP3 compression allows the entire book to fit on one CD. Without MP3 compression, it would take approximately 16 CDs to hold audio of the entire student text!