This curriculum guide is intended to assist Latin teachers in the School District of Philadelphia in achieving one of the goals of Latin instruction: the development of word power in English through a structured study of Latin roots and affixes. The guide may be used in two different ways. First, it may form the basis for a separate Interdisciplinary Classical Humanities minicourse or minor course on English vocabulary building through Latin, or it may be used to give secondary school Latin pupils practice in reading and writing English derivatives encountered in the test "Artes Latinae." The guide differs substantially from traditional vocabulary development materials in the following ways: (1) Latin roots are taught in the context of Latin quotations and proverbs, thereby making their learning more meaningful. (2) An audiolingual approach to Latin roots and English derivatives and cognates is used. (3) The learning materials are specifically designed to appeal to urban teenagers. There are 15 units in the guide, including a preliminary one designed to make pupils aware of theories on the origin of languages. Each unit is divided into a statement of objectives and a list of suggested activities. (Author/PM)