The document discusses second language (L2) instruction, defining it as deliberate efforts to facilitate L2 acquisition through both meaning-focused and form-focused instruction. It outlines various instructional strategies across different proficiency stages and emphasizes the importance of formal instruction over exposure in promoting L2 acquisition by enhancing comprehensibility, interaction, and advanced thinking skills. Additionally, it provides practical tips for teachers to improve their instructional methods to better support L2 learners.