Dear ____ (Miss/Mr/Mrs/Mdm),
I am XXX, your student from the previous batch of graduates.
How are you? I really miss my secondary school days, when I can stil hang out and play with my friends! Right now in high school, the workload just gets heavier each day, and it's fortunate enough for us to actually finish our assignments on time!
I miss your lessons greatly - they are always fun and interesting, even though the content might be boring at times, but the way you conducted your lessons always made the content come to life. Right now in high school, all the teachers just bullet-train through their lessons, and it's up to the students to figure out the lesson content by themselves.
I miss you too. You were more than just a teacher to me. When I needed help with anything - be it family issues, school matters or sometimes even health issues, you will be there for me. You are always there looking out for your students, and I feel truly blessed and lucky to have you as my secondary school teacher.
This is just a shrt update on my high school life, all the best for the rest of the school term ____ (Miss/Mr/Mrs/Mdm)!
Yours,
XXX