Just a Mail?

I send a E-mail to Paitaya, my Thai language teacher. It is first mail I send to her, when she leave Xiamen University. I was busy in this semester so that I didn't spend time on Thai. So there is no mail to Paitaya.
This semester finished. I decide to take the Thai language course again. So I send a mail to Paitaya.
This morning I received reply from Paitaya. She told me that she teach 4 courses and 24 hours load a week. She feel happy since the students' progress. What kind of she!
At the end, she told me "Being teacher , we do not want anything except having chance to hear some news from our students." I realized the mail is not just a mail for Paitaya. There are another means.
At you spare time, remember to give a call or a mail to teacher.