1 ENVIRONMENTAL EDUCATION PROGRAMS CONSTRUCTION: SOME CONCEPTUAL AND EVALUATION GUIDELINES PALMA-OLIVEIRA, JOSÉ MANUEL GASPAR DE CARVALHO, RUI Faculdade de Psicologia e de Ciências da Educação, Universidade de Lisboa Alameda da Universidade, 1649-013 Lisboa Corresponding author: RUI GASPAR DE CARVALHO rfgc@portugalmail.pt KEYWORDS: environmental education(s); behavioral constraints; evaluation. ABSTRACT: This article aims to present some guidelines that in our opinion must be taken into account in the development of an Environmental Education project. These can be divided in conceptual and evaluation guidelines. Regarding the first, we will present a categorization of different types of Environmental Education, based on the degree to which they are influenced by implicit knowledge about learning and take into account situational (e.g., a social dilemma situation) and other proenvironmental behavioural constraints. Concerning the second, we propose a three stage process of Environmental Education implementation, that gives emphasis to the continuous evaluation and monitoring of the process and it’s adjustment to the target population: 1) Diagnostic; 2) Intervention; 3) Assessment and follow-up. Only following these stages, can we assure the validity and objectivity of our intervention and, therefore, it’s effectiveness.