Introductory courses are for learners with zero background in Mandarin (Putonghua). It lays important ground for further studies. Intro Level A workbook is essential for beginners to make the leap in their Mandarin study. It contains 54 listening exercises ( about 100 minutes) focused on important structures and words usages. Workbook provides excellent opportunities for people to listen and learn, to read and learn through numerous exercises. It will save you time, frustration and money in trying to listen to TV, or movies which is far too advanced for beginner learners. It is best used with Intro Level A textbook.