This document was prepared by Thaddeus W. Fowler, Ed.D. and Karen K. Miles, Ph.D., Education and Information Division (EID) of the National Institute for Occupational Safety and Health (NIOSH). Editorial services were provided by John W. Diether and Rodger L. Tatken. Pauline Elliott, Gino Fazio, and Vanessa Becks provided layout and design services.
The authors wish to thank John Palassis and Diana Flaherty (NIOSH), Robert Nester (formerly of NIOSH), and participating teachers and stu- dents for their contributions to the development of this document.
This document was updated by Michael McCann, Ph.D., CIH, Director of Safety Research, CPWR-Center for Construction Research and Training and Carol M. Stephenson, Ph.D., NIOSH.