This handbook was developed to help the vocational teacher aid students in solving mathematical problems in vocational education classes. Most of the examples in the handbook were derived from metal-working and industrial mechanics classes; however, the procedures explained through them will work in any vocational class. The handbook is divided into seven major sections. The first six sections are organized on the basis of major strands in mathematics: measurement, fractions, decimals, percent, conversions, and geometry. Each of the six sections describes the concept, provides suggestions for a concrete-manipulative development of the concept, and provides a sampling of the variety of application-oriented activities. The last section contains ideas and references to enrich the teacher's efforts to improve mathematical skills of vocational students. In addition, information is provided for the teacher on the teaching-learning sequence in mathematics, attitudes toward mathematics, and suggestions for teaching the various concepts. (KC)