There is no particular form for this unless the college or university provides one. Generally, in the first paragraph the student should introduce himself and explain why he or she is writing the letter. Keep the first paragraph as concise and clear as possible so that the reader can immediately understand its urgency.
The next paragraph should narrate the account of what happened, and why the appeal should be granted. Include all the necessary facts in order to legitimize your case. Refer to any specific provisions of the college handbook that are applicable. Also, provide specific times and dates when particular events occurred.
Close the letter by thanking the recipient for their time and the opportunity to be heard.
Para su conveniencia, debajo del texto en español le brindamos la versión completa de este formulario en inglés. For your convenience, the complete English version of this form is attached below the Spanish version.