__________ (Name of the School),
__________ (School Address)
Subject: Apology for __________ (Mention mistake)
With all due respect, my name is __________ (Name of the Teacher) from __________ (Mention your department/ class) holding Employee ID number __________ (Staff ID number/ Serial Number Issued).
I am writing this letter to express my sincere apology to you for the incident that happened on __________ (Date of Mistake/ Incident) at __________ (Place of Mistake / Incident – if applicable). I am deeply sorry for __________ (Not Teaching/ Misplaced an important document / any other reason). I regret what I did and I am aware that I could have been more careful. I will do anything possible to make things right as I seek your forgiveness and guidance on this matter.
Thank you and I eagerly await your response.
__________ (Name of the Teacher)