I changed my topic. +Reasons

I changed my topic from 'Should teachers reveal their emotion while teaching or not?' to 'How can we catch student's emotion and use them in class?' because their were so many difficulties in researching the first one. First, lack of information. There aren't enough articles, thesis or even expert's opinion. Second, most thesis about teacher's emotion are charged. Like...

 

   

So, I thought in reverse. I experienced that my feeling affects the class ; when I felt bad, the course was so boring and passive whereas same course is fun and active when I feel good. Like this, I thought that students' emotion may affect the course and It would be great if teachers can know it and use it appropriately.