This document is a transcript of the videotape commentaries accompanying Chapters 1 to 5 in "Evaluating and Improving Teaching Performance: Inservice Kit." With the exception of material from chapter 1, the commentary is delimited to teaching effectiveness. Hence, the content lends itself to a program that focuses on the development of knowledge and attitudes regarding the identification and application of effective teaching skills. As the literature in the field of teaching evaluation suggests, such development is a natural first phase in a sequence of activities. Completing the sequence are observation, evaluation and supervision of teaching, with the last activity being premised on data emanating from those that precede. This document also provides an efficient way in which the videotape commentaries can be "previewed," without actual viewing. This information is useful for those wishing to familiarize themselves with the content of the videotapes but who do not have the time and/or access to the necessary viewing equipment. (JD)