To Mr/Ms/Mrs/Professor I want to sincerely apologize for playing games in my electronic dictionary during Wednesday's class.
More importantly, I really want to apologize for pointing finger at you when you said you could only give my electronic dictionary back the next day.
After this, I realized how impuslive I was, I should not do things like playing games during class, and especially, pointing finger at someone that I should respect.
Please forgive me for what I have done and I promise I will never do things like this again.
Sincerely