Dear [Principal's Name],
I am writing to apologize for being late to the staff meeting held earlier today. As a [teacher/staff member] of this school, it is my responsibility to attend these meetings on time and to contribute to the discussion.
I understand that being late is disrespectful to your time and that of other colleagues who arrived promptly. I take full responsibility for my tardiness and recognize that my actions were not in line with the expectations and standards set by our school.
I want to assure you that this incident is not representative of my usual punctuality and commitment to my job. Unfortunately, [explain why you were late, if possible]. However, I recognize that this is not an excuse, and I should have made better arrangements to ensure I was on time for the meeting.
I sincerely apologize for any inconvenience or disruption caused by my late arrival. I will ensure that this does not happen again in the future and will make every effort to be punctual for all future staff meetings.
Thank you for your understanding, and please let me know if there is anything else I can do to make amends for my tardiness.
Sincerely,
[Your Name]