The document is the fourth of a series, to be integrated with a G.E.D. program, containing instructional materials for the construction cluster. The volume focuses on concrete work and consists of 20 instructional units which require a month of study. The units include: (1) uses of concrete and occupational information; (2) soils, drainage, and preparation of subgrade for concrete placement; (3) simple forms for sidewalks, footings, and patio slabs; (4) materials used in cement; (5) cement types and concrete mixes; (6) water for concrete; (7) air-entrained concrete; (8) concrete working tools; (9) estimating the quantity of concrete required for a given job; (10) mixing concrete; (11) testing concrete; (12) formwork and forming concrete; (13) reinforcing concrete; (14) joints, joining, and crack control; (15) handling and placing concrete; (16) concrete finishing; (17) concrete protection and curing techniques; (18) stripping forms from concrete; (19) special finishes, textures, and coloring; and (20) machine applications and modern techniques. Each unit includes the following information for the teacher: aim, instructional aids, equipment, primary references, introduction and motivation, a presentation of integrated concepts, application, evaluation criteria guideline, summary, suggested time and sequence listing, and supplemental references and resource materials. A bibliography is included. (EC)