These are actual teaching discs. The author begins by going through the two basic charts and explaining how to use them. Then he systematically teaches through each lesson. Explanations and examples are given, some of which do not appear in the book. Lessons vary in length. Sections are introduced, and encouragements to students are given. On screen charts and examples are shown; this is not just a talking head production. These discs do not replace the book, but they can replace a live teacher. In at least one case, a classroom teacher plays the lesson, has the students do the exercise, and then walks the students through the corrections. Every lesson is covered; it is a very thorough series of lectures.
These are now available through New Leaf Publications, www.nlpg.com.