This guide for language teachers offers a developmental approach to curriculum design for second language learning. The approach suggests a progression of tasks at various difficulty levels, geared to the gradual development of language knowledge, concepts, skills, and attitudes. Ten levels of attainment, or stages of learner development, are defined and grouped into five categories (teacher-dependent learner, learner able to get by, functioning linguist, independent and competent linguist, and linguistic intellectual). For each level, behavioral objectives in four language skill areas (listening, speaking, reading, writing) are specified. Within each category of learner stage, common learner characteristics, progression between stages, suggested exercises and class activities, and classroom teaching and lesson planning techniques are outlined. Examples are offered in French. All behavioral and curriculum recommendations are based on specifications of the United Kingdom's National Curriculum for modern foreign languages. (MSE)