This document provides instructions for writing a formal letter of invitation. It explains that the letter should be addressed to the invitee, state what the invitation is for including the event, place, date and time. It also notes that the letter should provide more details about the event such as what parts it will include, who will attend, and what attendees will find there. The letter is meant to be around 125 words and should include specific vocabulary related to the topic, as well as grammar related to the future like will, going to, and present continuous. It closes by stating when the assignment is due.