This teacher's manual is one volume of a six volume curriculum for the secondary level, designed to provide a systematic, group-oriented approach to decision-making in areas crucial to adolescent development: work, drug (substance) use and abuse, sexuality and social relationships, juvenile law, and people and government. The manual is divided into 11 sections. The first section provides the rationale and conceptual framework of the curriculum including a developmental model of adolescent decision-making which involves five core skills, i.e., social perspective-taking, alternative and consequential thinking, communication, and evaluation. Section 2 provides an overview of decision-making as a core school program component. Sections 3-10 describe specific approaches to decsion-making including: (1) assessment and evaluation; (2) the adolescent decisions curriculum (guidelines and areas covered in other volumes of the program); (3) classroom meetings; (4) school climate and discipline; (5) parent involvement; (6) community outreach; and (7) a "whole school" model approach to decision-making. Section 11 provides guidelines for starting the program and case studies of program approaches. The four appendices include a needs and interest assessment for school staff, sample needs and interest tools for parents, parent evaluation ideas, and the Interpersonal Negotiation Strategies Interview form. (BL)