This teaching guide outlines a semester course for those students who need review work in concepts from algebra and geometry. Successful completion of this material would serve as a prerequisite to the study of trigonometry. Sequence, textbook references, and time allotments are suggested. Units studied are: the real numbers; operations on the real numbers; relations, functions, and graphs; first-degree equations; inequalities; quadratic equations; and logarithms. Appendices provide instruction in set concepts, properties of right triangles, relations, functions, and graphs. (RS)