Review for other "Words with wings" book applies to this one as well. The books need to be treated as a set.The student workbook only makes sense given the teaching given from the instructors manual. The workbooks are wonderfully uncluttered because of the instructors manual absorbing the complexity that the teacher must understand. This is very beautiful if you plan on teaching young folks, or older folks for that matter how to sing gregorian chant. It is wonderful because it is tightly structured and meant to teach prayer and singing simultaneously.