This manual is designed for trainers of social service aides in New Careers training programs. In these programs, (1) persons from disadvantaged backgrounds are prepared through on-the-job training and other methods for entry-level positions in human service agencies; (2) employing agencies are motivated to make corresponding changes in their structures, supervisory patterns, and attitudes to accommodate New Careerists; and (3) both New Careerists and employing agencies plan for career advancement opportunities and resultant changes in human service. Included in this guide are an explanation of the New Careers Training Model and a glossary of New Careers terms plus explanation of the trainer's responsibilities (establishing and maintaining relationships with agency staff; getting to know aides' backgrounds; dealing with trainee anxiety and insecurity; orienting aides to the agency, community, and clientele; arranging the training environment; selecting materials to be covered; and preparing a kit for trainees) and training methods and techniques (lecture, observation, discussion, participation, printed material, audiovisual aids, skill and process learning, demonstration, case study, and role playing). Also available is an accompanying manual for trainees which presents the basic social services curriculum (SP 002 032). (SG)