Options, you forgot to add them.
I would choose the pattern importance which is basically listing the events in paragraphs in the order of how important they are the most import at the top and the least important at the bottom.
Dear, (teachers name) I'd
first like to start off by saying thank you. Thank you for dedicating all your time and effort into teaching us and helping us understand all of the lessons we have learned this year. Your work is appreciated by me and my other classmates and without you I wouldn't of been able to learn everything I have so far. You have made online teaching so much more enoyable and I always look forward to going to your class.
what does that mean?!?!!?
