(Chord Buddy). This Teacher Review Pack includes one ChordBuddy device, a Teacher's edition book/DVD, and a Student book all at a special price, well below retail. It's intended to allow a teacher to put the device on a guitar and see how effectively it works and how the method books support a teacher as he or she leads the class. After this review, the teacher can then arrange to purchase multiple devices and books to outfit a classroom or school district.