Dear Principal,
I hope this message finds you well.
I am a student of 9th grade, section “Yellow.” I am writing to request a leave of absence due to a high fever. My doctor has advised me to take complete rest.
Therefore, I need one day of leave to recover, from January 10th to January 11th. I will complete my homework from home and will ensure that you are not disappointed in me.
I will also borrow the notes from my friends to keep up with any missed classes. I kindly request that you grant me leave for the mentioned dates above.
Yours sincerely,
(Your Name)