The guide is designed to assist teachers at the secondary level in using "Lingua Latina Secundum Naturae Rationem Explicata," the Nature Method Institute's Latin series. Particular emphasis is placed on the early chapters of the course. Abundant materials in the form of pattern practices and mimicry drills are given as supplementary material for the book's first four chapters. There is also a unit on Latin songs and one on holiday materials (recipes and song translations). Each chapter also has cultural content. A form for evaluating the guide is included. It is suggested that the initial presentations be aural-oral with the students' books closed, followed by pattern practices, then an explanation of the grammar in Latin accompanied by simple Latin questions, written pattern practices, and finally one section assigned as homework or written classwork and another on English derivatives of Latin lexical items to be done orally and then in written form. It is suggested that a workbook be set up to keep a record of these derivatives. (SCC)