This letter offers an explanation for poor grades to a college admissions department.
1234, Main Street
Boston, MA 02123
04 April, 2005
<Recipient Address Goes Here>
<time information was requested>, you requested information from me explaining the poor grades I received from <school> in <subjects/classes>.
I trust this explanation will prove sufficient, and that my admission to <school name> will not be affected further by the poor grades. If you have any other questions, please contact me so that we may move on to other matters.
Thank you very much.
encl: <List of enclosed items goes here>