The purpose of this study is to develop an introductory guide for teaching music theater vocal pedagogy and styles. This guide is intended for experienced classical teachers. The conclusions of the research on mix/belt singing revealed significant differences between music theater vocal pedagogy and classical vocal pedagogy. To aid the classical teachers in learning about music theater vocal pedagogy and styles, the guide details the results of the pedagogical research on mix/belt singing and compares and contrasts the pedagogy to classical singing.