The document provides an overview of lesson planning and task-based language teaching. It discusses the key stages of a task-based lesson including the pre-task, task, and post-task stages. In the pre-task stage, the lesson objectives and task instructions are presented to motivate and prepare students. The main task involves students using language communicatively. In the post-task stage, students review and reflect on their language use. Different types of tasks and factors affecting task difficulty are also summarized.