This manual brings together in one package basic knowledges and facts about estimating to assist the building trades instructor in developing his instructional program. Teaching estimating as a separate unit, or integrating it into a regular program are given as two different instructional approaches. After a description of the estimating process and its importance, the various aspects (36 in this manual) of estimating are discussed separately, e.g. expense sheets, concrete block, ceiling joist, wallpaper, strip or hard wood flooring. A bibliography, glossary of terms (Appendix A), and plans for a garage and workshop (Appendix B) are included. (WL)