This document discusses the relationship between second language acquisition research and language teaching. It reviews how SLA research influenced communicative language teaching in the early 1980s and more recent proposals to integrate focus on form into meaning-based curricula. The document outlines four macro-options for focus on form interventions based on SLA research: input processing, input enhancement, form-focused output, and negative feedback. It also discusses issues related to choosing linguistic forms for focused instruction and how individual learner factors and context can affect benefits.