The document provides guidance on writing situational letters. It discusses: 1) Learning objectives which include planning an informal letter using different methods, identifying the appropriate tone and register, and practicing letter formats. 2) A sample letter is analyzed to demonstrate an overly casual tone that is not suitable. Students are advised to choose a polite yet friendly tone for family members. 3) A planning process is outlined which involves understanding the scenario, recipient, letter type, discussing pros and cons of different choices, and thanking the recipient while assuring them in a kind but not too formal manner.