Address the letter. At the top of the letter, state your name and contact information, including your phone number and email address. Begin the letter by addressing it to the dean or to the admissions department.
Introduce yourself. Begin the body of the letter by stating several brief facts about yourself. Explain the dates you previously attended this school and the key events that have occurred since you last attended. In this paragraph, also explain the purpose of the letter which is to ask to be readmitted into the school.
Describe in detail the reason for leaving the school. In the next paragraph, explain to the dean or admissions department the reason you left the school. If you transferred to another school, explain why you did this and why you would like to return. If you were kicked out or dropped out, describe the incident that caused the event or decision. Explain any poor choices you previously made and focus on your new goals and plans in life. Describe any significant life changes that will help increase your credibility with the reader.
Ask the school to allow you to return. Use clear, direct language when asking the school to consider this option and describe any other factors that would persuade the school to allow you back.
Close the letter. Thank the reader for considering this request and tell him that you look forward to hearing a reply. Include your phone number again and sign the letter "Sincerely" followed by your name.