As far as school admission letter writing is concerned it is all about making application through letter to the school. Normally School Admission Letters are written by parents seeking admission for their son/daughter in the school. You follow the following format of School admission letter
Name of Sender,
Address of Sender,
Name of Recipient,
Name of school,
Address of school,
In the first paragraph you need to make request for the admission to the person whom you are writing the letter. You can introduce your son/daughter for whom you are seeking admission.
You can write in the second paragraph about the procedure that you followed for the admission but could not be able to get admission even after that.
Here you can ask the reason for not giving admission. You can also give recommendations of various personalities whom the school is well aware and respect their recommendations.
At the last make humble request for the admission once again.
Name of sender