This document is one of a series of nine individual units of instruction for use in roofing apprenticeship classes in California. The unit consists of a workbook and test. Eight topics are covered in the workbook and corresponding multiple-choice tests. For each topic, objectives and information sheets are provided. Information sheets are illustrated with line drawings and photographs. Topics covered in the unit include the following: general description of rigid roofing; hoisting and handling of rigid roofing materials; two-piece mission barrel tile; concrete interlocking tile; slate and rigid asbestos shingles; and other rigid roofing materials. A list of required instructional materials and a glossary of terms used in the roofing trade are included in the publication. (KC)