In the final lesson of the ‘Sports and Games’ unit, students focus on writing emails by learning to identify and use key email features, such as addressing, subject lines, and attachments. They practice writing by creating an email from a character named Mark to his friend Jake, inviting him to join a sports club and providing details about what to bring and when to come. The lesson also emphasizes the importance of maintaining an informal tone with friends and relatives and encourages students to review their work before sending an email.