This document provides an overview of topics and grammar covered in Unit 5, which includes discussing future plans using "be going to" and discussing necessity and suggestions using modals. It focuses on using "be going to" to discuss decided plans and "will" for possible plans. For modals, it gives examples of using words like "must", "need", "have to" for necessity and "should", "ought to", "had better" for suggestions. Sample sentences are provided to illustrate the target grammar structures.