1. Second language learning is facilitated when learners are engaged in interaction and meaningful communication. 2. Effective classroom learning tasks and exercises provide opportunities for students to negotiate meaning, expand their language resources, notice how language is used, and take part in meaningful interpersonal exchange. 3. Meaningful communication results from students processing content that is relevant, purposeful, interesting, and engaging. 4. Communication is a holistic process that often calls upon the use of several language skills or modalities.