A public health workforce that is competent to respond to emergencies is extremely important. We report on the impact of a training program designed to prepare public health nurses to respond appropriately to emergencies. The program focused on the basic public health emergency preparedness competencies and the emergency response role of public health workers employed by the New York City School Department of Health and Mental Hygiene School Health Program. The evaluation methods included pre/post-testing followed by a repeat post-test one month after the program. The program resulted in positive shifts in both knowledge and emergency response attitudes.